Got me a new bucket !!!

[Ivan]

So you're gonna downsize the carbs?? Thats a new one

Maybe I am but carb size dont matter if I add ram air into the carbs direct, I enjoy tweaking and tuning until I get it right and if I remember 2 strokes didnt come out with reeds till the late 80's so I might have to add them,

[F5 Dave]

Damn have you seen how buckets has gone the rules are gone most of the buckets are basically GP bikes now noone runs legal carbs these days I'm running it how it has been tuned and its staying like it tell me how many guys run 12mm carbs only me on my RG50

Hey Ivan, try running a bit of grammar in there huh? Remember we can't hear your voice inflection. Makes it hella hard to read, let’s try with just a minimum tickle:


“Damn have you seen how bucket rules have gone? Most of the buckets are basically GP bikes now. No-one runs legal carbs these days. I'm running it how it has been tuned and it’s staying like it. Tell me how many guys run 12mm carbs? only me on my RG50.”

Much betterer huh?


Well my bike is legal to the rules, as are most. Read the rules, they are in your licence book. Chassis is free, engine can’t contain any competition parts bar carb/ignition & now piston.

A few people have pushed the cc rule in the 4 strokes as 140 rule was hard to find parts for, (not that I condone that) 150 rule should have fixed that. 125 air-cooled should have equiv 24mm carb. Everything else is open carb size (bar 100cc 4 strokes in F5, -but I’ve never seen one).

The trick is to choose a bike that can utilise the rules to best effect. For example the GT125 is a twin - hence will have a natural power advantage, all other things being equal. The rotary valve system is another advantage. Reeds are all very well but rotary valve has made a come back in 125GP bikes, all the Aprillia & Derbi bikes were rotary valve, late 90s early 2000s (not sure if they still are).

[Ivan]

Hey Ivan, try running a bit of grammar in there huh? Remember we can't hear your voice inflection. Makes it hella hard to read, let’s try with just a minimum tickle:


“Damn have you seen how bucket rules have gone? Most of the buckets are basically GP bikes now. No-one runs legal carbs these days. I'm running it how it has been tuned and it’s staying like it. Tell me how many guys run 12mm carbs? only me on my RG50.”

Much betterer huh?


Well my bike is legal to the rules, as are most. Read the rules, they are in your licence book. Chassis is free, engine can’t contain any competition parts bar carb/ignition & now piston.

A few people have pushed the cc rule in the 4 strokes as 140 rule was hard to find parts for, (not that I condone that) 150 rule should have fixed that. 125 air-cooled should have equiv 24mm carb. Everything else is open carb size (bar 100cc 4 strokes in F5, -but I’ve never seen one).

The trick is to choose a bike that can utilise the rules to best effect. For example the GT125 is a twin - hence will have a natural power advantage, all other things being equal. The rotary valve system is another advantage. Reeds are all very well but rotary valve has made a come back in 125GP bikes, all the Aprillia & Derbi bikes were rotary valve, late 90s early 2000s (not sure if they still are).

Hey you will be lucky if this bikes carbs are even 17 they are that small, Yes I know your bike is in the rules Dave but I am saying what is the chance that a puddy little stock bike with 18mm carbs say and is a twon is going to give your bike a run for its money not complaining just using your bike as an exampel

[Ivan]

Hey you will be lucky if this bikes carbs are even 17 they are that small, Yes I know your bike is in the rules Dave but I am saying what is the chance that a puddy little stock bike with 18mm carbs say and is a twon is going to give your bike a run for its money not complaining just using your bike as an exampel

Nah mynes reed valve I got the bike and I am working on it but its not doing to well firing on one cylinder dead plugs bike wont even ride, Well it should be fine these carbs are only 17mm Maximum

[F5 Dave]

Hold on a min, crumbs these things are so old I’d forgotten. GP125s are rotary valve singles. GTs are 125 piston port twins, no reeds.
T125 stingers (like wolfs are erm, probably piston ports, maybe rotary, can’t recall).

Course you could make a short manifold & a 24mm carb. Maybe with a reedblock or two could be the go.

[Ivan]

Hold on a min, crumbs these things are so old I’d forgotten. GP125s are rotary valve singles. GTs are 125 piston port twins, no reeds.
T125 stingers (like wolfs are erm, probably piston ports, maybe rotary, can’t recall).

Course you could make a short manifold & a 24mm carb. Maybe with a reedblock or two could be the go.

Nah Dave its a twin but the reed idea is actually a good Idea I just had the carbs off and it dont have reed so I might make my own Manifold with a reed cage and I could join it couldnt I so I only need one carb

[speedpro]

Nah Dave its a twin but the reed idea is actually a good Idea I just had the carbs off and it dont have reed so I might make my own Manifold with a reed cage and I could join it couldnt I so I only need one carb

Guys in AK got one of these and made a manifold that joined the two cylinder intakes together using copper plumbing tube. In the middle they had a "T" with a 24mm carb hanging off that. It wasn't particularly "high-performance" looking but went well enough considering other aspects of the bike. You don't need reeds.
I had a piston port Suzuki TS100 single which had a very nice powerband AND made 19.9hp. LOTS and LOTS of careful work of course but it had a nice powerband even with 200deg of ex timing and 200deg of intake timing. Pete Sales also did a twin years ago and it went real well.

[geoffm]

Nah Dave its a twin but the reed idea is actually a good Idea I just had the carbs off and it dont have reed so I might make my own Manifold with a reed cage and I could join it couldnt I so I only need one carb

I would supect getting it running well on a single carb would be some feat. The length of the intake will be to long for the rev range you are working in. The inlet won't suit taking a read block and you will have fun fitting one. All be more trouble than it is worth IMO. Nothing is imposible, but I would have thought the effort woudl be better expended elsewhere - tyres, suspension, frame, rider, porting and pipes in no particular order.
Geoff

[Ivan]

I would supect getting it running well on a single carb would be some feat. The length of the intake will be to long for the rev range you are working in. The inlet won't suit taking a read block and you will have fun fitting one. All be more trouble than it is worth IMO. Nothing is imposible, but I would have thought the effort woudl be better expended elsewhere - tyres, suspension, frame, rider, porting and pipes in no particular order.
Geoff

Hey all thats done, I got me an Aprillia RS50 chassis lined up good suspension good tyres good frame good farings, I'm not to bad a rider I think, No porting has been done new piston and rings kit new oil pipes are being made I'm still at school and have access to the workshops to do this and also my uncles an engineer so he can help

[Ivan]

Bike seems to be running well at the momment on single cylinder let alone when I add the new spark plug to get the other cylinder running now this bike should be fun, I dont worry if I win any small races cause me and RG100!! are gonna win the bucket enduro on the FXR150

[texmo]

Maybe I am but carb size dont matter if I add ram air into the carbs direct, I enjoy tweaking and tuning until I get it right and if I remember 2 strokes didnt come out with reeds till the late 80's so I might have to add them,

Why do you want reed valves any way?

[Ivan]

Why do you want reed valves any way?

They are better they rely on vacuum pressure and also help prevent blow back from the carbs but any way I just got a spark plug and now my motor sings almost high sided me on our grass am so used to RG50 abd jumped on that and man was it good, me and dad are also going to port it with tooth paste just to make the ports smooth and shiny he says used to make the bikes sing in the 80's

[Bert]

me and dad are also going to port it with tooth paste just to make the ports smooth and shiny he says used to make the bikes sing in the 80's

try chrome polish and a die grinder with a polishing bit,
though in saying this, don't you want a wee bit of intake turblance ?
you would have to turn to the two-stroke tuning bible, G Bell.

Good luck with the twin (man more moving two-stroke parts to stuff)
be interesting to see it go at the next meeting.

[Ivan]

try chrome polish and a die grinder with a polishing bit,
though in saying this, don't you want a wee bit of intake turblance ?
you would have to turn to the two-stroke tuning bible, G Bell.

Good luck with the twin (man more moving two-stroke parts to stuff)
be interesting to see it go at the next meeting.

Yeah I reckon cant wait till the next round its going to be mad, me on my little twin cylinder 125 two smoke, Doesnt smoke much either I found one problem, I kept starting it on one cylinder and the second exhaust is now fill with petrol and oil and flooded lol, but oh well it still go's so hard