Here we go again... [Archive] - Kiwi Biker forums

Drew

5th April 2014, 22:15

I've somehow been conned into rebuilding this now...rather than in three or four years as my schedule slackens off.

Grafted a 1990/91 CBR400 front end to the MVX tonight, and decided the best place for the stingers.

Gonna get someone else to assemble the motor this time round, as the GT was an epic fail when I tuned it. I think the crank seals need doing, so it might as well get a couple rod kits and a proper freshen up. I have a rolling road in the shed, so tuning should be a breeze for the lucky punter.

I'm not riding it, so I don't care if it's slow. A couple of friends are in need of a steed so they might as well use this instead of it sitting in my back yard. Does that make them factory backed? I'm building it, and then they ride it after all.

Gonna run an old CBR600 set of wheels, so 125 GP slicks are on their right width carriers. Only sacrifice to speak of might be brakes, but it's looking like a 400 caliper will grab the smaller disk no sweat.

ducatilover

5th April 2014, 22:57

:love: Sick cunt

Pumba

6th April 2014, 07:13

Shouldn't you be fixing a sidecar?

husaberg

6th April 2014, 08:04

two stinger @rear cool....... but isn't the MVX250 1 up 2 down.
Are you going to send them around with mx style headers?

Drew

6th April 2014, 17:05

two stinger @rear cool....... but isn't the MVX250 1 up 2 down.
Are you going to send them around with mx style headers?

Just gonna turn the barrels around and hang the carbs out the front.

husaberg

6th April 2014, 17:08

Just gonna turn the barrels around and hang the carbs out the front.

But arn't they already?:confused:
http://www.kiwibiker.co.nz/forums/attachment.php?attachmentid=295064&d=1395218211

mr bucketracer

6th April 2014, 17:19

But arn't they already?:confused:
http://www.kiwibiker.co.nz/forums/attachment.php?attachmentid=295064&d=1395218211hes running a gt 125 so will need the worlds longests stingers lol

Drew

6th April 2014, 17:19

But arn't they already?:confused:

GT125 motor. I have thought about an MVX running as a twin, utilizing Honda scooter barrels. 100cc watercooled twin, with a very good six speed box would be fucken lethal I reckon.

Not sure how or who to sort the crank though. Can the middle slugs crank webbs just be replaced with a long pin?

mr bucketracer

6th April 2014, 17:23

GT125 motor. I have thought about an MVX running as a twin, utilizing Honda scooter barrels. 100cc watercooled twin, with a very good six speed box would be fucken lethal I reckon.

Not sure how or who to sort the crank though. Can the middle slugs crank webbs just be replaced with a long pin?the bike would weigh to much with a mvx motor

Drew

6th April 2014, 17:31

the bike would weigh to much with a mvx motor

Be fuck all in it between a GT lump and an MVX missing a head, barrel, and close to a third of it's crank mass.

husaberg

6th April 2014, 18:03

wildman

6th April 2014, 23:07

Shouldn't you be fixing a sidecar?

Did he break it again?

Drew

7th April 2014, 06:27

Shouldn't you be fixing a sidecar?I need the rolling road finished first.

Did he break it again?Na, thing doesn't run right after a few laps. Can't figure out why.

wildman

7th April 2014, 22:16

I need the rolling road finished first.

Na, thing doesn't run right after a few laps. Can't figure out why.

Ha at least yours does a couple of laps, my bucket one craps out after one lap and it's only got one cylinder. I think i've cornered the market on stuffed TF motors:facepalm:

WilDun

21st April 2014, 08:36

Oh i get it now...........

No idea re the cranks.

Husa, Of course, you are the master when researching and producing photos of stuff, but for people like myself who have been away from the scene for years and years, the photos can be a little confusing when not labelled! - luckily I did happen to know about the Ducati arrangement (which I assume these pics are of), but would you label them? ie. when you can.

Thanks, Will.

husaberg

21st April 2014, 08:45

Husa, Of course, you are the master when researching and producing photos of stuff, but for people like myself who have been away from the scene for years and years, the photos can be a little confusing when not labelled! - luckily I did happen to know about the Ducati arrangement (which I assume these pics are of), but would you label them? ie. when you can.

Thanks, Will. Fair enough, the last ones BMW

ajturbo

21st April 2014, 09:43

Peter Sales..

Drew

21st April 2014, 16:08

Peter Sales..Funny thing that, since I have to go up there and pick up a CBR frame if he's still got it. So the motors might just end up back at his to be built after all.

WilDun

21st April 2014, 20:34

Fair enough, the last ones BMW

Sorry to question this particular one but I don't think it's BMW - Ducati I believe! (one of the very few I actually do know), but thanks anyway.
Will.

husaberg

21st April 2014, 21:26

last one as in last picture in series.
The others were all Ducati though :shifty:

http://www.kiwibiker.co.nz/forums/attachment.php?attachmentid=295851&stc=1&thumb=1&d=1396764571

With the F800GS (http://www.motorcycle.com/manufacturer/bmw/2009-bmw-f800gs-review-86985.html), rather than utilize a pair of counter-balanced shafts, BMW employs what’s called a balancing connecting rod. This helps keep the engine compact and allows for use of a semi-dry oil sump. The method by which this balancing rod works to counter vibration gets a little technical and any attempt by me to explain its operation would have you snoozing at the keyboard in no time (it’s akin to the system used by Ducati in its rare single-cylinder Supermono –Ed.). Put simply, the balancing connecting rod is set at 180 degrees from the crank pins, thereby “the mass forces resulting from the swinging movement combat, in every crankshaft position, the oscillating mass forces from the crank drive (piston and con-rod proportion).” Dry stuff, but it works well.

WilDun

22nd April 2014, 00:02

[QUOTE=husaberg;1130710433]last one as in last picture in series.
The others were all Ducati though :shifty:

Ah, missed that - ok, sorry

WilDun

22nd April 2014, 09:20

last one as in last picture in series.
The others were all Ducati though :shifty:

http://www.kiwibiker.co.nz/forums/attachment.php?attachmentid=295851&stc=1&thumb=1&d=1396764571

That principle was first invented by Doug Hele (who was the designer at Triumph) about 25 years before Ducati used it! - I remember that, but didn't pay much attention at the time!

Will.

quallman1234

1st May 2014, 09:32

How we doing?

Drew

1st May 2014, 09:38

No progress since the new front end went in it. Other than stripping the frame and cutting off anything I didn't think needed to be there.

Drew

25th May 2014, 20:48

I'm toying with a really dumb idea, based on a fucked motor that's in my shed.

A CBR600 motor that's fucked, and a GL145 hybrid. Bottom end of the GL, and a quarter of a CBR barrels, slug, and head.

Is it possible to the minds of others? Is it a case of taking to things with a band saw, sealing the water and oil galleries exposed, getting it to bolt on, and cranking up my one off 150cc twin cam, four valve, water cooled, 12000rpm beast?

Sketchy_Racer

25th May 2014, 21:02

ducatilover

25th May 2014, 21:09

Would be plausible with an f2 onwards motor? I think f1 motors had a central cam chain, whereas later ones were hangin' out the side.
But the deck height may be way the fuck too low too

Drew

25th May 2014, 21:58

Depends on what year the 600 is if it's worth while or not. Not impossible though and would be awesome!!1989 CBR

Would be plausible with an f2 onwards motor? I think f1 motors had a central cam chain, whereas later ones were hangin' out the side.
But the deck height may be way the fuck too low too
Cam chain hangs out the wrong side though. Need to use F1 and put a case around the chain.

Cam is laterally retained where it will remain after the head gets chopped up and everything.

husaberg

25th May 2014, 22:00

Guy did one on salt flat racer based on a postie and poweroll did a 150 on a cr85 can't show you PC is dead so yes of course a vt250 on a Honda single has been done as well

Sketchy_Racer

25th May 2014, 22:01

1989 CBR

Cam chain hangs out the wrong side though. Need to use F1 and put a case around the chain.

Cam is laterally retained where it will remain after the head gets chopped up and everything.

Best be would be to use the stock barrel and get a modern 600 head where the chamchain etc is on the right side and put that on the stock barrel (with a new piston)

a 89 600 head will be pretty rubbish even if it a 4V

Drew

25th May 2014, 22:05

Best be would be to use the stock barrel and get a modern 600 head where the chamchain etc is on the right side and put that on the stock barrel (with a new piston)

a 89 600 head will be pretty rubbish even if it a 4V

I'll talk to my parts man, see what he has in the way of fucked motors.

ducatilover

25th May 2014, 22:35

ducatilover

25th May 2014, 22:39

Guy did one on salt flat racer based on a postie and poweroll did a 150 on a cr85 can't show you PC is dead so yes of course a vt250 on a Honda single has been done as well

VT Hondas are all RHS cam chain, but I suppose you could use the rear head on a GL jug with the head spun around? The VT250F2 Integra (wtf name is that) and Spada heads flow best, but the F2 has a peakier cam.

husaberg

26th May 2014, 07:54

VT Hondas are all RHS cam chain, but I suppose you could use the rear head on a GL jug with the head spun around? The VT250F2 Integra (wtf name is that) and Spada heads flow best, but the F2 has a peakier cam.

VT's have a cylinder reversed remember.........
http://www.kiwibiker.co.nz/forums/attachment.php?attachmentid=266037&d=1341634464
This is te one oyster did there was one before that as well.
the salt flat racer was based on a FZR600 but the Poweroll one was on a i think f3 CBR6........
I am sure drew can google them.......

mr bucketracer

26th May 2014, 08:01

Guy did one on salt flat racer based on a postie and poweroll did a 150 on a cr85 can't show you PC is dead so yes of course a vt250 on a Honda single has been done as wellthis one p_CRF150_eng_compl.jpg

mr bucketracer

26th May 2014, 08:06

we have a late 600 head , wast of time putting it on a engine with roller bearing you need the rpm , vt 250 better but the valves in the new heads are so wide having 66mm or so pistons it dont work, 89 fzr600 would be better having a long stroke small bore

husaberg

26th May 2014, 09:22

Here is the FZR600 headed bike.
http://www.dlra.org.au/forum/viewtopic.php?t=556

Oh it is a XL125 bottom end.......

Yow Ling

26th May 2014, 09:41

Drew, if you are serious about this , I have a Honda bottom end with VT 250 head, hot cams bla bla
Its already done , needs final assembly, has radiator etc $200

Drew

26th May 2014, 10:23

Drew, if you are serious about this , I have a Honda bottom end with VT 250 head, hot cams bla bla
Its already done , needs final assembly, has radiator etc $200

Bloody hell, that's a bargain!

PM me some bank details. Don't suppose you have ignition and stuff for it?

Drew

28th May 2014, 17:15

VT's have a cylinder reversed remember.........
http://www.kiwibiker.co.nz/forums/attachment.php?attachmentid=266037&d=1341634464
This is te one oyster did there was one before that as well.
the salt flat racer was based on a FZR600 but the Poweroll one was on a i think f3 CBR6........
I am sure drew can google them.......Mike has that at the moment. I am going to procure it and save myself the hassle of starting from scratch.

SCORE!

So that motor will be going into an RG150 roller, with a pair of wheels that will accept hoops of a decent size.

The GT will be going into a CBR roller that someone left here, and hopefully I can get it tuned up nice for a couple boxes of beer.

That leaves the MVX roller. I've got a DT100 (that if I'm not mistaken belonged to this Mike character also), that needs a rod kit. So I might as well get that done and have a bike for when one of the others is fucked.

Yow Ling

28th May 2014, 17:45

Pete jones still has his, ask kickaha about the history of this one, I think he has some idea about it. dt didn't come from here, there is one in the shed though

Drew

28th May 2014, 18:01

Pete jones still has his, ask kickaha about the history of this one, I think he has some idea about it. dt didn't come from here, there is one in the shed thoughHmmm, I thought you had let me buy it instead of yourself. From Steve who made a trailer out of the home made RS125 copy.

Anyhoo. Send your bank details through and I'll sort out some freight options.

Kickaha

28th May 2014, 18:11

ask kickaha about the history of this one,
It was built by Peter Lambert but I don't think he ever finished it 100% and raced it

Kickaha

28th May 2014, 18:12

I've got a DT100 (that if I'm not mistaken belonged to this Mike character also), that needs a rod kit.
Is it watercooled?

Drew

28th May 2014, 18:14

Is it watercooled?Na, air cooled.

About the only mod I will do to it, is locate the head on the barrel...after the rod kit gets done of course.

Yow Ling

28th May 2014, 18:46

Hmmm, I thought you had let me buy it instead of yourself. From Steve who made a trailer out of the home made RS125 copy.

Anyhoo. Send your bank details through and I'll sort out some freight options.

Ahh yes , Gavimoto's old bike.
Dont worry about figuring out the freight , I can buy pretty cheap freight here

Grumph

28th May 2014, 19:26

It was built by Peter Lambert but I don't think he ever finished it 100% and raced it

No idea if he raced it but it was a runner....He fired it up for me as he wanted my opinion....It had the most painfully sharp exhaust note I'd ever heard. i asked what advance it was running and the penny dropped. Crank powered ignition (with advance curve) but the trigger was on the cam - and had mechanical advance as well. easily fixed - i think he came back to around 32 - 36 degrees.

Drew

28th May 2014, 19:45

No idea if he raced it but it was a runner....He fired it up for me as he wanted my opinion....It had the most painfully sharp exhaust note I'd ever heard. i asked what advance it was running and the penny dropped. Crank powered ignition (with advance curve) but the trigger was on the cam - and had mechanical advance as well. easily fixed - i think he came back to around 32 - 36 degrees.

This is bloody brilliant news. Hopefully there's bugger all the motor needs, and I can just build the bike and send people out on it.

Might as well get started by chucking some CBR600 wheels in the chassis.

F5 Dave

28th May 2014, 20:29

1000 wheels will be faster, don't go off all 1/2 arsed about it.

Drew

28th May 2014, 20:41

1000 wheels will be faster, don't go off all 1/2 arsed about it.

These are admittedly a little heavy. But they're 3.5 inch rear, and 2.75 front. The sizes are good for slicks, and I've got them sitting here.

Yow Ling

28th May 2014, 20:47

Fucking hell Drew, now the pressure is on , the Classic bike gods are watching you, you better not screw this one up or you wont be able to come back to kb

Drew

28th May 2014, 20:52

Fucking hell Drew, now the pressure is on , the Classic bike gods are watching you, you better not screw this one up or you wont be able to come back to kb

Hahahaha, I've made a cock of myself many times. Allowed or not, I keep coming back anyway.

Grumph

29th May 2014, 07:28

Fucking hell Drew, now the pressure is on , the Classic bike gods are watching you, you better not screw this one up or you wont be able to come back to kb

He doesn't need permission to screw it up, it's a given...

Memory says Pete had problems which may be why it's not together. possibly head gasket ? Does it use an air cooled barrel ? probably a good idea to dry deck the thing Drew if it hasn't been done.

Pete's still around ChCh - dealt via the net with him a couple of months ago.

Drew

29th May 2014, 07:40

He doesn't need permission to screw it up, it's a given...

Memory says Pete had problems which may be why it's not together. possibly head gasket ? Does it use an air cooled barrel ? probably a good idea to dry deck the thing Drew if it hasn't been done.

Pete's still around ChCh - dealt via the net with him a couple of months ago.

Yeah, air cooled barrel still...off to look up "dry decking".

Drew

29th May 2014, 07:44

Oh, that seems simple enough.

If he was struggling to get a good seal, one would need to assume there's a surface matching issue, no?

Guess I'll find out. Hopefully a surfacing table is all I'll need.

quallman1234

29th May 2014, 08:46

Save yourself some time and work and just run the stock RG150 wheels if you still have them. Untill it becomes a problem.
Which it wont for a very long while. They are wider than FXR rims i'm pretty sure, and FXR rims still work okay-ish with slicks.

I think they are 2.15 front 2.75 rear from memory

So how many buckets is this on the go?

Drew

29th May 2014, 10:50