View Full Version : Now I'm rebuilding one
So, since the DT motor was an epic fuckin fail, my bike is getting rebuilt around a GT125 motor instead. Which is much more betterer anyway, since Suzuki is BOSS!
To catch anyone who wasn't watching my last thread toward the end, after discovering my failure with the DT AJ kindly donated his GT125 to me. Which I shot up to Himatangi and picked up yesterday. Cheers AJ, you're an absolute star!
When I got it home, I put the kick start on it and tried to turn it over...FUCK, this thing is seized! Talk to AJ about getting the spare motors up from CHCH asap.
Turns out, that I'm a spaz AGAIN. The kickstart return spring is bung on the motor, and when I put the starter on it was already round to it's stop.
I only found this after I'd pulled the head and barrels off unfortunately, but since the crank cases were full to the brim with two stroke oil it needed to be done anyway.
Today's progress was made up of getting the motor out of it's GT roller, and rebuilt on the bench. Highlight? NOT cleaning surfaces and making bloody base gaskets, that's for friggin sure! Then getting the DT lump (free to whoever wants it, otherwise it's scrap), out of the MVX frame and removing the (as it turns out over engineered) mounts I spent so long getting just right.
In unrelated news, the rule on carbs for F4 says, "F4 2 stroke engines over 104cc are restricted to carburation equivalent to a single 24mm carburettor". Now if I take this to mean surface area must be equivalent, I'm allowed two 17mm carbs. But, as many people will tell you, it is very easy to increase the size of the opening by reshaping the barrel of the carb, without increasing the sideways measurement of 24mm.
Does that mean I can get a 24mm carb, bore it out to bloody near square, and then match that surface area in two carbs?
It's a rule stretch, but a rule break? Thoughts?
quallman1234
8th July 2012, 18:05
What happened to the DT? No idea with the Carb rule, multiple ways of interruppting it... If it aint too quick then people won't care ;).
What happened to the DT? No idea with the Carb rule, multiple ways of interruppting it... If it aint too quick then people won't care ;).
When I first got the DT it needed some assembly. Bryce instructed me on how to make sure there was enough clearance between slug and head, which I did. But only in one spot. Turns out the head gasket is not located and was sitting off to one side, and once I fired it up and got the revs up the piston has been making a sandwich, with the gasket being filling, head and slug being the bread. Result? Piston pinching the top ring...and a bent conrod.
Ocean1
8th July 2012, 18:19
Does that mean I can get a 24mm carb, bore it out to bloody near square, and then match that surface area in two carbs?
It's a rule stretch, but a rule break? Thoughts?
Pound to a pinch of shit there's a clause in the book somewhere that says that if there's any doubt you get the ruling body's clerk of pedantry to clarify.
He's almost never in favour of cheap fun.
crazy man
8th July 2012, 18:29
if l was you l would run 2 mvx carbs with a manifold down to 17 mm
Pound to a pinch of shit there's a clause in the book somewhere that says that if there's any doubt you get the ruling body's clerk of pedantry to clarify.
He's almost never in favour of cheap fun.
For now I'll sleave down a couple of the 21mm flat slides from an MVX to 17mm, then out of round that to increase the area.
FastFred
8th July 2012, 19:14
.... the rule on carbs for F4 says, "F4 2 stroke engines over 104cc are restricted to carburation equivalent to a single 24mm carburettor". Now if I take this to mean surface area must be equivalent, I'm allowed two 17mm carbs. But, as many people will tell you, it is very easy to increase the size of the opening by reshaping the barrel of the carb, without increasing the sideways measurement of 24mm.
Does that mean I can get a 24mm carb, bore it out to bloody near square, and then match that surface area in two carbs?
It's a rule stretch, but a rule break? Thoughts?
A rule break is my thoughts .... but try taking a pole on it.
If your right I know what TeeZee will be doing tommorow ..... he already knows that with more flow through the carb (more carb area) he can pick up some usefull low end torque on his 30+hp engine as the current 24 is strangling things a bit.
Every thread I've seen on this seems to go with a 24mm round hole or the equivalent area pi R squared is your friend here
Every thread I've seen on this seems to go with a 24mm round hole or the equivalent area pi R squared is your friend here
It doesn't say "round hole" anywhere in the rules is kinda what I'm driving at.
A rule break is my thoughts .... but try taking a pole on it.
If your right I know what TeeZee will be doing tommorow ..... he already knows that with more flow through the carb (more carb area) he can pick up some usefull low end torque on his 30+hp engine as the current 24 is strangling things a bit.
30 fuckin ponies! I somehow don't think I'll manage to DOUBLE the standard power of 14.2 that I have, don't mention anything about this to him!
Ocean1
8th July 2012, 19:40
Make a split manifold symetrical about a horozontal centreline, (top and bottom carb ports).
Run a single 24mm carb on one port, nothing at all on the other.
You'll need a special size main jet and a very very skinny needle.
Make a split manifold symetrical about a horozontal centreline, (top and bottom carb ports).
Run a single 24mm carb on one port, nothing at all on the other.
You'll need a special size main jet and a very very skinny needle.
You're gonna need to open paint, and draw me a picture. I can't visualise anything from reading it sorry mate.
Ocean1
8th July 2012, 20:07
You're gonna need to open paint, and draw me a picture. I can't visualise anything from reading it sorry mate.
Don't have me crayons here.
Imagine a manifold for two carbs, one above the other. Now take one carb off and run the other one as rich as fuck.
If you can make it work you'll be a clever boy, but in the few months it takes for the rig to be specifically outlawed you'll be fook'n quick.
Madness
8th July 2012, 20:12
In unrelated news, the rule on carbs for F4 says, "F4 2 stroke engines over 104cc are restricted to carburation equivalent to a single 24mm carburettor". Now if I take this to mean surface area must be equivalent, I'm allowed two 17mm carbs. But, as many people will tell you, it is very easy to increase the size of the opening by reshaping the barrel of the carb, without increasing the sideways measurement of 24mm.
Do the rules mention a sideways measurement? I'd have thought that if the inlet wasn't round the measurement would be taken at it's widest point.
Don't have me crayons here.
Imagine a manifold for two carbs, one above the other. Now take one carb off and run the other one as rich as fuck.
If you can make it work you'll be a clever boy, but in the few months it takes for the rig to be specifically outlawed you'll be fook'n quick.
So, just leave the second 'port' open? It might work if the second port had a butterfly. Technically I suppose it is just a breather hole and not part of the carb.
Do the rules mention a sideways measurement? I'd have thought that if the inlet wasn't round the measurement would be taken at it's widest point.
They don't, but nor do they say anything about what shape they need to be at all. A square 24mm carb has a surface area of 576 square mm. A round one 452.4 square mm.
Now I know that no one has made a square carb for the detriment of flow it'd cause, but there are many different shapes that have been fashioned, and surface area is quite hard to be exact about?
mossy1200
8th July 2012, 20:24
You would be better to get a cr carb and remove the head side flush then open 2 inlet manifold holes so the carb becomes a Y intersection and take each outlet directly to each inlet.
Yow Ling
8th July 2012, 20:28
It doesn't say "round hole" anywhere in the rules is kinda what I'm driving at.
The rule is pretty easy to understand, carburetion equivelent of a single 24mm carb gives you 452 square mm , I guess you knew that when you figured out that 2 x 17mm carbs were within the rules, no need to cheat, carb isnt really a restriction on making lots of power
Madness
8th July 2012, 20:32
A square 24mm carb has a surface area of 576 square mm. A round one 452.4 square mm.
And a square 24mm across the flats measures 33.94mm at it's widest point, diagonally :msn-wink:
The rule is pretty easy to understand, carburetion equivelent of a single 24mm carb gives you 452 square mm , I guess you knew that when you figured out that 2 x 17mm carbs were within the rules, no need to cheat, carb isnt really a restriction on making lots of power17mm is gonna be pretty restrictive per 67cc I reckon, but I'll try both the flat slides sleaved down, and a single 24mm flat slide if it works at all.
What would be the legality of an oversize carb I.e. bigger than 24mm with a space on top of the slide to stop it opening past the relevant area? Probably wouldn't help top end but may help elsewhere.
17mm is gonna be pretty restrictive per 67cc I reckon, but I'll try both the flat slides sleaved down, and a single 24mm flat slide if it works at all.
24mm per 62cc is pretty good though innit?
I think the square idea is queer, screw that; a single 24mm on a manifold has to be worth the effort.
Undeniably legal and huge area for a 125, 62cc for a 24mm carb.
I'd guess it might take a bit of trial and error to get the right balance between length and shape. (ie short=good straight=good)
As I'm sure I've said before; I'd give this a nudge if I wasn't already fully committed.
What would be the legality of an oversize carb I.e. bigger than 24mm with a space on top of the slide to stop it opening past the relevant area? Probably wouldn't help top end but may help elsewhere.
Smart brains. I guess it fits the rules but surely wouldn't be as good as a purpose built 24.
Maybe good as a stopgap.
mossy1200
8th July 2012, 21:53
Take the head end all the way off a round slide cr leaving only the 24mm outlet hole and weld 2 curved ally pipe prejoined to meat at 24mm. Shape and weld to the cr carb body.
A flat slide would be alot harder to fashion if your after a short inlet manifold.
speedpro
8th July 2012, 22:15
It's been done before using copper plumbing fittings and a single 24(?)mm carb. The carb mounted on the foot of the "T" and each leg of the top of the "T" fed one cylinder through a 90deg bend. Worked a treat. If you can't solder the bits together use araldite
bucketracer
8th July 2012, 22:50
The rule is pretty easy to understand, carburetion equivelent of a single 24mm carb gives you 452 square mm , I guess you knew that when you figured out that 2 x 17mm carbs were within the rules, no need to cheat, carb isnt really a restriction on making lots of power
452 mm2 is what the fast boys are working with.
It's been done before using copper plumbing fittings and a single 24(?)mm carb. The carb mounted on the foot of the "T" and each leg of the top of the "T" fed one cylinder through a 90deg bend. Worked a treat. If you can't solder the bits together use araldite
A single 24 and Y junction inlet would be my pick for a 125cc 180deg twin as each cylinder is only sucking for half the time so two 62.5cc cylinders could easily share a single 24mm carb.
TeeZee has sucked 34 crank hp through his 24mm OKO carb, so the 24mm carb rule as its commonly understood is probably less of a restriction than Bucketeers used to think.
Some good info, especially that the single carb has been done before. If pulse timing doesn't screw it up then it would seem that 24mm single carb is less restricting for me running a twin than a 125 single.
Bonus.
TZ350
9th July 2012, 07:59
I think you would be on the money with a single 24mm carb on a 125 twin 2-stroke. I was planning on doing that with a GT125 twin we have here.
I think you would be on the money with a single 24mm carb on a 125 twin 2-stroke. I was planning on doing that with a GT125 twin we have here.
Me too. Only issue I can think of is if there's a pulse timing clash, and keeping enough gas in the bowl.
Paul in NZ
9th July 2012, 09:37
Mount a single card on a longer Y manifold and it should help with the torque. FWIW the new redesigned (almost up to the 80's now by golly) Moto Guzzi V7's have a single injector on a long Y manifold and its claimed it increased all the good things and decreased all the bad things....
F5 Dave
9th July 2012, 09:53
its a 2 stroke, keep that manifold short. I think you will find it fast enough, but there is one better way that involves some serious machining & a single reedblock mounted vertically.
Either way if you can get the crank safe to pull some revs it will be a weapon.
F5 Dave
9th July 2012, 09:55
Make a split manifold symmetrical about a horizontal centreline, (top and bottom carb ports).
Run a single 24mm carb on one port, nothing at all on the other.
You'll need a special size main jet and a very very skinny needle.
various restrictor classes have engineered an air 'leak'. I think on a 2 stroke you are inviting more seizures than one might wish on an enemy.
jasonu
9th July 2012, 10:46
To catch anyone who wasn't watching my last thread toward the end, after discovering my failure with the DT AJ kindly donated his GT125 to me. Which I shot up to Himatangi and picked up yesterday. Cheers AJ, you're an absolute star!
Thoughts?
Can you hold your breath the whole time while driving over the Himatangi bridge??? I can:Offtopic:
jasonu
9th July 2012, 10:55
various restrictor classes have engineered an air 'leak'. I think on a 2 stroke you are inviting more seizures than one might wish on an enemy.
Big mouth. I was hopeing someone would try it and post up the results...
TZ350
9th July 2012, 12:12
keeping enough gas in the bowl.
I don't think the fuel will be a problem.
if there's a pulse timing clash
Not sure about that one myself, it could help or hinder, maybe both but at different rpm.
F5 Dave
9th July 2012, 13:13
. . and keeping enough gas in the bowl.
Actually I'm with him on this one. Can be a problem with some smaller carbs.
Some yamaha banshee's riders use a single carb for 2 180 degree firing cylinders and they win bottom end and loose top end.
Well, the motor is mounted, hardest bit was getting it high enough so that the chain wouldn't foul the swing arm. Who the fuck thought that the out put shaft sitting in front of the input shaft is a good idea? Shame on whoever didn't understand that the chain now needs to be slacker than it could have been!
Fills the hole a shot load better than the dt did though, looks quite neat. Post pics later.
Just pipes to make and we're away laughing! That's inlet and exhaust pipes. Got a book on two strokes from Bryce to figure out what the fuck I'm doing on the zorst front.
Oh yeah, I also took some time out of my day and mounted a 17 inch rear wheel. Anyone got a standard rear brake caliper for what I think is an Fxr?
Ocean1
9th July 2012, 17:45
various restrictor classes have engineered an air 'leak'. I think on a 2 stroke you are inviting more seizures than one might wish on an enemy.
Yeah.
Probably better to run carbs on both ports, but no fuel to one...
There will be a way to get the right twice the fuel through one carb, but you're right, the place to discover that is on a flow bench.
its a 2 stroke, keep that manifold short. I think you will find it fast enough, but there is one better way that involves some serious machining & a single reedblock mounted vert......
I had a long think about that last time you posted this idea. A vortex reed block might be the answer. It could enable two reeds per intake and solid core between them. Would you have to seel off between intakes or leave them to ballance? Might be slightly easier to make???
Or just sleeve it down to 100cc watercool it and not have the issue!
The motor is piston and reed ported, so would be shit loads of fucking around for either of those ideas.
crazy man
9th July 2012, 18:49
a\
I had a long think about that last time you posted this idea. A vortex reed block might be the answer. It could enable two reeds per intake and solid core between them. Would you have to seel off between intakes or leave them to ballance? Might be slightly easier to make???
Or just sleeve it down to 100cc watercool it and not have the issue!only l can have a hundy twin
a\only l can have a hundy twin
I have the option to chuck two Honda beat top ends on there still, Bryce said it the other day with an evil grin on his dial:devil2:
Or it was him laughing at me, I cannot be sure.
ajturbo
9th July 2012, 20:04
talk with Warren... he has plans to make the thing pump out around 26-28hp...
quallman1234
9th July 2012, 22:02
talk with Warren... he has plans to make the thing pump out around 26-28hp...
Or just get it going first and don't be an ivan :)
Or just get it going first and don't be an ivan :)
It's all mounted up standard, will put chambers on it and the run it with two carbs first outing prolly.
There are however more motors for it on the way:yes:
Drew
10th July 2012, 19:06
Chucked some pipes on it today, not measured proper or nothing. Just a couple cones off the standard headers, bit of big straight, reverse of the cones and some cans.
Just wanna get it fired up for now. Hear me some pukka pukka.
slowpoke
11th July 2012, 01:59
There are however more motors for it on the way:yes:
Is this a protoype bucket or CRT bucket? Don't wanna break the engine limit rule!
Drew
11th July 2012, 06:37
Is this a protoype bucket or CRT bucket? Don't wanna break the engine limit rule!
Doubt anyone has married the motor and frame combo that I am, so it's a prototype. Will be legit though, on the off chance that I go fast enough to make people question it.
koba
11th July 2012, 09:12
Will be legit though, on the off chance that I go fast enough to make people question it.
Speaking of which, don't forget that box of Heineken you are going to buy me when I :spanking: you. (On the track of course)
:Pokey:
Allowance for some development time must be made of course.
richban
11th July 2012, 09:27
Doubt anyone has married the motor and frame combo that I am, so it's a prototype. Will be legit though, on the off chance that I go fast enough to make people question it.
Sad but true. I remember when the MVX was new and sort of cool. A buddy from school saved all his paper boy money and sold his dirt bike to buy one. Oh the pain he when through. It just died in so many ways so often it might have put him of bikes for life.
Prototype for sure.
jasonu
11th July 2012, 17:47
Chucked some pipes on it today, not measured proper or nothing. Just a couple cones off the standard headers, bit of big straight, reverse of the cones and some cans.
Sounds like it should be a winna...:2thumbsup
Drew
11th July 2012, 20:39
Sounds like it should be a winna...:2thumbsupThat's not the correct sarcasm emoticon.
I have someone who knows what they are doing to help with proper pipes, I'm just fuckin around at teh moment for it's own sake.
Drew
12th July 2012, 13:35
MMMkay, since it seems to be the way of the bucketeer, I'm gonna lay out some ideas that I'll likely never get round to doing. I'll prolly get the thing going as it sits and ride it till it dies then sell it for scrap.
I'm actually a bit spoilt for choice at the mo, for a good base to make something stupidly fast. The GT is a twin which with a good crank and allowed to rev it could be made to decimate all, but why not take that a step further? Why not graft a couple of water cooled 50cc slugs and barrels on it, and do away with the carb restrictions at the same time?
Once that weapon is a runner, I could slot it into my RGV frame to gain brakes and rigidity at the same time!
I really can see why there are some quite expensive buckets around, but the limiting factor for me is cash, so I'll stick with my current $30 bike for now.
Oh wait, I bought a chain the other day. FUCK! Thing nearly owes me a hundy already!
Drew
12th July 2012, 13:41
Serious question time. If I can prove that a 2 stroke twin can run fine with a single 24mm carb, would anyone give a fuck if I just put two on my bike?
There is really no difference, and I spoke to a very clever dude today who thinks the idea I have to negate the possible pulse timing issue is sound, and in practice today in many vehicles.
F5 Dave
12th July 2012, 14:21
. . .
I'm actually a bit spoilt for choice at the mo, for a good base to make something stupidly fast. The GT is a twin which with a good crank and allowed to rev it could be made to decimate all, but why not take that a step further? Why not graft a couple of water cooled 50cc slugs and barrels on it, and do away with the carb restrictions at the same time?. . .
!
Which is exactly what Phil Bird (?) did with his. Crazyman has it now & is on the GPR build in his new frame so should see the light of day this year. Was made back in the day & used MB50 barrels water cooled. Seemed to go ok but not campained for long. 5 speed is a restriction, but there you go.
F5 Dave
12th July 2012, 14:23
Serious question time. If I can prove that a 2 stroke twin can run fine with a single 24mm carb, would anyone give a fuck if I just put two on my bike?
There is really no difference, and I spoke to a very clever dude today who thinks the idea I have to negate the possible pulse timing issue is sound, and in practice today in many vehicles.
Sorry I don't follow? Put two 24mm carbs on? why would that be ok? or two 17s? I'm confused. I'm sure it will run great with a 24.
Drew
12th July 2012, 17:00
Sorry I don't follow? Put two 24mm carbs on? why would that be ok? or two 17s? I'm confused. I'm sure it will run great with a 24.Two 24's on it. Easier than building a manifold. Doesn't really matter, I need to hack the barrels up no matter what I do.
Yow Ling
12th July 2012, 20:25
Two 24's on it. Easier than building a manifold. Doesn't really matter, I need to hack the barrels up no matter what I do.
Just fit some X7 barrells, if you gunna cheat go big, the stock carbs are too big, if you cant even try to follow the rules , why bother turning up
Kickaha
12th July 2012, 20:34
would anyone give a fuck if I just put two on my bike?
There is really no difference
No difference apart from the fact it's FUCKING ILLEGAL as a bucket
Turn up down here with it and I'll beat you with a fucking big stick and then set Jo on you
Drew
12th July 2012, 23:14
Just fit some X7 barrells, if you gunna cheat go big, the stock carbs are too big, if you cant even try to follow the rules , why bother turning up
No difference apart from the fact it's FUCKING ILLEGAL as a bucket
Turn up down here with it and I'll beat you with a fucking big stick and then set Jo on you
Jeeze lads, I didn't think it was gonna get a bite at all!
I'll do it legal, which will fuel exactly the same as the cheating, but with weeks more fucking around. According to the theory, (which seems to mean nothing to a 2 stroke), there is no problem with a single carb.
Drew
13th July 2012, 17:47
It lives! Since it sat so long and the oil filled up the crank cases, it took quite a while to get fired up. It would fire a few times and die, so I would pull out the plugs, clean them up and repeat. Ten or fifteen times later away it went. Runs pretty clean, and sounds fuckin great!
Does anyone have a rear caliper and carrier for an RG150? That's about all that is stopping me from riding. Not that I use the rear brake, but some safety homo or another would likely get their knickers in a twist if I didn't have one at all.
Should probably try and fuel it right before giving it a thrashing too.
TZ350
14th July 2012, 18:51
It lives! Since it sat so long and the oil filled up the crank cases, it took quite a while to get fired up. It would fire a few times and die, so I would pull out the plugs, clean them up and repeat. Ten or fifteen times later away it went. Runs pretty clean, and sounds fuckin great!
A lot of the early Suzukis like the GT had a drain plug in each crankcase ... :D ... good to hear you have got it going.
Drew
14th July 2012, 21:56
The castings have a spot where the drain holes would be, but they've never been drilled and tapped.
Did a bit more to it today. Got brakes on the rear now, and built up the steering stops so the tank doesn't get the bash. Chopped the peg mounts down since taking a pilling is just cruel to the little 125. Changed the points for the left piston since it wasn't running great over that side.
That's where I hit my first snag of this build. The barrels have been grooved and O ringed in place of head gaskets. Turns out I should have made a couple new ones when the head was off, as the left side leaks. No matter, easy fix.
Real news of the day though, Luke and I decided that Jimmy's bike had sat there in need of finishing for too long. So Luke spent all day putting a tail section on it, then we teamed up and put a pipe on it. Sorted the chain, and then the gear linkage.
Finally it was start time. But the kick start is buggered inside. No worries, let's put a clutch cable on and clutch start it. Cool, whip the cover off to put the cable in, and the actuator arm is missing! So we couldn't fire it up after all that.
quallman1234
15th July 2012, 17:03
I've got some plastic packer plates you can have for free, if you need some nylon drew. BTW whgats wrong with the stock carbs??
crazy man
15th July 2012, 17:21
have you got some pic's of your bike drew
Drew
15th July 2012, 17:42
I've got some plastic packer plates you can have for free, if you need some nylon drew. BTW whgats wrong with the stock carbs??Cheers bro, that'd be awesome. I don't actually know what the standard carb size is, but the 17mm maximum size for two carbs that are on it will be very limiting.
have you got some pic's of your bike drewOnly on my Iphone, and the email I sent them in never showed up on my puter.
Will get RiffRaff to take some and upload this week.
F5 Dave
15th July 2012, 18:26
Does anyone have a rear caliper and carrier for an RG150? . . .
yeah I do have a caliper & even has decent pads. No carrier though. a six of Macs Gold will buy it.
Drew
15th July 2012, 18:37
yeah I do have a caliper & even has decent pads. No carrier though. a six of Macs Gold will buy it.
I took a look at the bike that the wheel came from, sure enough there was a caliper and carrier there. Cheers though.
Christ, these $1000 FXR race bikes are common as muck, here's another one !!http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-494162303.htm
Buckets4Me
15th July 2012, 22:05
Christ, these $1000 FXR race bikes are common as muck, here's another one !!http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-494162303.htm
not and fxr or $1000
http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-491150249.htm
Drew
16th July 2012, 06:33
Why are you posting that on here? I don't have a thousand dollars to spend on a toy, if it was a real race bike I'd be in like flinn.
Yow Ling
16th July 2012, 18:49
Why are you posting that on here? I don't have a thousand dollars to spend on a toy, if it was a real race bike I'd be in like flinn.
If it was a "real" race bike it wouldnt be a grand. But somehow would be cheaper than buckets
Drew
16th July 2012, 20:45
If it was a "real" race bike it wouldnt be a grand. But somehow would be cheaper than buckets
Oi, on topic in this thread A-hole.
I whipped the motor out and made new O-rings for the head tonight. Chucked it back in and fired it up, seems to have sealed it up, still not running on two properly though, I have a horrible suspision that I need to do something as difficult as...Change the plugs. Since when I take them out and clean them it runs on two sweet as for a little bit.
Bert
16th July 2012, 21:33
Oi, on topic in this thread A-hole.
I whipped the motor out and made new O-rings for the head tonight. Chucked it back in and fired it up, seems to have sealed it up, still not running on two properly though, I have a horrible suspision that I need to do something as difficult as...Change the plugs. Since when I take them out and clean them it runs on two sweet as for a little bit.
Drew; you know you should use two stroke oil not 10-40 in the premix!!!:killingme
seriously; timing might be just a little retarded.. hopefully AJ had clear marks on the coil base plate to aid re-assembly.
or it might actually be the pipes. any small errors in length is going to kick your ass with cylinders that size.
Buddha#81
16th July 2012, 21:38
Oi, on topic in this thread A-hole......
haha that A-hole was a guy who could and probally would have hooked ya up with a bucket for the BOB.....bridge burned there.
Kickaha
16th July 2012, 21:50
timing might be just a little retarded..
The owner certainly is
Drew
17th July 2012, 06:34
haha that A-hole was a guy who could and probally would have hooked ya up with a bucket for the BOB.....bridge burned there.I think he prolly know's it's all a big piss take if he's read any of my posts before. Although... you seem to have missed it.
I haven't asked to use a bike for the BOB, only an idiot would let me use their bike if it was any good.
The owner certainly isSuch a sweet talker, I'm gonna give you the biggest wet kiss when I see you fucker.
Drew
17th July 2012, 06:36
Drew; you know you should use two stroke oil not 10-40 in the premix!!!:killingme
seriously; timing might be just a little retarded.. hopefully AJ had clear marks on the coil base plate to aid re-assembly.
or it might actually be the pipes. any small errors in length is going to kick your ass with cylinders that size.
Funny story, my old T500 used to run better on 30/40 than two stroke oil.
Timing wouldn't explain why it will run with a clean plug, and not without though would it?
F5 Dave
17th July 2012, 09:38
Sheesh, spring for some plugs ya tight fisted winka.
Drew
17th July 2012, 09:44
Sheesh, spring for some plugs ya tight fisted winka.
I will, but I only had a couple hours last night to work on it, and no one would have been open to sell some plugs at half seven anyhow.
Drew
20th July 2012, 14:13
Changed the plugs today whilst I was doing some other stuff, key on, fuel on, choke on, first kick, and pukka pukka pukka.
Took it for a quick hoon down the street and I am pretty happy with how well it goes. Will do some jetting to it, chuck on some nylon and it's ready to race.
STOKED:cool:
F5 Dave
20th July 2012, 17:11
yeah McQueen showed up on his std one & did quite well, they aren't too slow.
Hey I wonder for his race prep he retreats into a darkened room & recites "I am Lightening. I am Speed" (for car-toon lovers)
Drew
20th July 2012, 17:22
Think stds were 18, so they could be sleeved, but yes Keihins a much better carb, but downdraft not ideal if motor horizontal.
I could re mount the motr lying forward to get it to work, but then I can't run a chain. Hmmm, decisions decisions.
F5 Dave
20th July 2012, 17:55
yeah & possible gearbox oil issues. vs compromise
Drew
20th July 2012, 20:26
I'll make an elbow rubber/plastic mount thing.
Drew
1st August 2012, 18:46
Someone wanted photos. Here's a couple from when the motor and 17in rear wheel went in. It's got pipes and shit now, but I don't gots no pictures of that shit.
F5 Dave
2nd August 2012, 10:11
Man, time to have a Sweep up!
Drew
2nd August 2012, 10:16
Man, time to have a Sweep up!
Na, the leaves soak up the oil.
Drew
3rd September 2012, 16:56
Dunno if I'm ever gonna ride the bike at this rate. Had the head off the other day, and a head stud snapped when putting it back on. No stress, whip the barrels off to sort that, and for some reason checked for bearing play. Sure enough, the left rod has play.
Shoot up and pick up my spare cranks, one is fucked also, so out of four cranks I have one good one.
So yesterday I spent making a motor, I split the X4 which was the motor in the bike, but since it's easier to tune a piston ported motor than a piston/reed ported critter, I decided to go with a GT bottom end instead.
Cool, build a motor from a couple boxes of bits, go to bolt it in. Although the internals are identical, the casings are completely different so I need to mount the motor up...again.
Will have it running again this week, and over the next couple weeks get the X4 casings up to Sketchy for some modification. To go into my RGV roller for a bike that should be capable of actually winning races.
Ocean1
3rd September 2012, 18:44
Stick with it mate, if it was easy I'd be doing it.
Speaking of which, if you need anything fuct by an expert let me know, eh?
Drew
3rd September 2012, 18:48
Speaking of which, if you need anything fuct by an expert let me know, eh?
I'm good at wrecking it, without even riding the bloody thing.
Drew
11th September 2012, 20:37
Dunno if anyone is reading this, but I'll post it up in hope.
Been a busy weekend and couple days, getting the bike ready for it's first race this coming weekend.
Got it fueled pretty well (I hope). Might have to take a soldering iron to the track and lean it out just a touch more in the morning to get max poke. I've done away with the shitty air filter things that were on it, after one came apart and my motor got a shit load of plastic crap through it. Better not have done any damage, I recall it making a funny noise briefly. No air cleaners means I needed to stop water getting at the carbs while I test ride it round the block, since it PISSED down this arvo. Enter the rear hugger off my RGV. WIN!:first:
Started getting the crash protection on too, so it's looking like I might just get the fuckin thing to a meeting after all.
Kornholio
11th September 2012, 21:04
Dunno if anyone is reading this, but I'll post it up in hope.
:corn: :niceone:
TZ350
11th September 2012, 21:57
Dunno if anyone is reading this, but I'll post it up in hope.
:corn: :niceone: and me too ... :drinknsin
ajturbo
12th September 2012, 07:22
i too want to see the old girl going again...:woohoo:
slowpoke
12th September 2012, 07:48
Bloody hell man, I'm knackered just reading about it, let alone doing it. Goodonya. When's the next possible meeting?
nudemetalz
12th September 2012, 12:19
Has anyone ever made a wholly successful two-stroke twin before ,..ie GT or RD125 ?
I remember back in the late 80's Pete Sayles having a T90 bored out to 100 and was an absolute rocketship. Wonder what ever happened to that..
F5 Dave
12th September 2012, 13:13
Last I saw it was lifted about 10ft off the ground in his workshop.
crazy man
12th September 2012, 13:23
Has anyone ever made a wholly successful two-stroke twin before ,..ie GT or RD125 ?
I remember back in the late 80's Pete Sayles having a T90 bored out to 100 and was an absolute rocketship. Wonder what ever happened to that..think that engine is in my shed also have the frame as well . think the engine was in a side car as well at some stage
nudemetalz
12th September 2012, 13:45
Love to see that engine in an RS125 frame.
crazy man
12th September 2012, 14:00
Love to see that engine in an RS125 frame.may put it into one of my frames or back to how it was. l only got one of the chambers for it told the other was cut up for somthing else but can copy it or make some updated ones. l also have the gt50 he built and the rd50 but need some good sec hand forks for that
F5 Dave
12th September 2012, 14:13
Love to see that engine in an RS125 frame.
Bwahahahaha!:laugh:
sorry Chris, but if you've seen an RS125 frame they are incredibly skinny meant for an MX 125 engine but the RG50 goes in easy enough but not with much spare room. Having a few T125 engines they are surprisingly wide, I can't imagine the 90 being narrower. CBR250 frame maybe.
nudemetalz
12th September 2012, 14:16
Actually, as a former owner of 2 x T125's and a T90 (AND also an RS-125).....you are completely correct :facepalm:
quallman1234
12th September 2012, 17:42
Bwahahahaha!:laugh:
sorry Chris, but if you've seen an RS125 frame they are incredibly skinny meant for an MX 125 engine but the RG50 goes in easy enough but not with much spare room. Having a few T125 engines they are surprisingly wide, I can't imagine the 90 being narrower. CBR250 frame maybe.
Perhaps a modern RS125 frame? They are alot more traditional design than the older generation ones with regards to the shock location. They seem to get CRF450's in them!
F5 Dave
12th September 2012, 18:00
The engines are about 400 wide. Get out the car jack!:shifty:
Drew
12th September 2012, 19:52
I'm not likely to build anything that flash. I might get round to mounting a half decent GT in the RGV, but it's not really that likely.
Drew
17th September 2012, 10:27
Well, epic fail for first day out.
Bike wasn't bad to ride, (according to the guy lapping ten seconds quicker than me on it), and it even pulled quite well. Right up until it seized and spat him off.
Wonder which side seized, prolly the one with the aluminium coloured spark plug!
So after listing my rgv motor for sale, and it selling within an hour, I will be making a nice motor from what we have, and putting it in my rgv.
Luke's gp125 motor will then go in the mvx as a spare bike for anyone sick enough to ride something I build.
Got a rider for this thing now...And a FOUR STROKE big block!
So very shortly, a shit load of GT125 stuff will be for sale cheap as fuck. As per my deal with he who donated it.
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