Bucket update

[speedpro]

That pipe is very short, like F5's 50cc pipe. Because of that the tuned length is short which means that it will work at very high rpm. Without measuring anything I'd guess that it looks like a 14,000rpm(or so) pipe. Actually I have a laser cut pipe for a 14,000rpm 100cc engine and it is longer than that one looks.

The end result is that the motor will never get on the power.

When I was a young fella I made the exact same mistake. I had a pipe design that would have worked, but to me it looked better cut short, so thats what I did. In the end I had to put the missing 8" back in the middle to make it work.

It also looks like it has a very steep end cone which means it could make lots of power but it will not rev past a certain point and will come up on that point pretty hard. No over-rev in other words.

[Skunk]

Ivan - buy and read 'Two stroke performance tuning' by Graham Bell. He explains everything with examples in a clear manner. Very good book. Covers evrything from the carb to the gearing.
I have a copy and refer to it before I do anything. The Pickles got it for me and it's one of the best books I've got.

[Ivan]

That pipe is very short, like F5's 50cc pipe. Because of that the tuned length is short which means that it will work at very high rpm. Without measuring anything I'd guess that it looks like a 14,000rpm(or so) pipe. Actually I have a laser cut pipe for a 14,000rpm 100cc engine and it is longer than that one looks.

The end result is that the motor will never get on the power.

When I was a young fella I made the exact same mistake. I had a pipe design that would have worked, but to me it looked better cut short, so thats what I did. In the end I had to put the missing 8" back in the middle to make it work.

It also looks like it has a very steep end cone which means it could make lots of power but it will not rev past a certain point and will come up on that point pretty hard. No over-rev in other words.

Thanks Speedpro, I was hoping it would work, I didnt care about the looks I was concerened about ground clearence issues, If the pipe moves it will start to drag, I am kind of used to no over rev with my RS,

I am really going to do some work to it today want it to work

Cool thing is it actually sounds like a GP bike cross with a Moto X bike has quite a awsome sound to it

[k14]

Cool thing is it actually sounds like a GP bike cross with a Moto X bike has quite a awsome sound to it

Yeah thats the way. Who cares if its fast or not (not as if that matters on a bike you're riding ) so long as it looks good and sounds good its a good bike

[Ivan]

Yeah I will try it out see how it works and then if I need to cut it andweld a new section in it.


14000 rpm I wish lol itd melt a piston before it hit that rev range,


I am going for a proper test ride today

[Ivan]

Yeah thats the way. Who cares if its fast or not (not as if that matters on a bike you're riding ) so long as it looks good and sounds good its a good bike

Nah I dont want to think its good I want it to be good,
Meaning I want it to produce power, I took it as a rough guess thats a 80cc Chamber on a 100cc that it would work well,

[Skunk]

14000 rpm I wish lol itd melt a piston before it hit that rev range

I don't think so Timmy...

I took it as a rough guess thats a 80cc Chamber on a 100cc that it would work well,

Not unless it's the same rev range etc. Do some reading!

[Ivan]

Yeah I would, But im not into wasting all my money on developing a bucket I would prefer to develop my RS 125.

Buckets is just my fun sport for me I do not take the racing serious in any way, As the 125 for the other hand that is my passion thats what I do and want to do professionly.


ANd witha buckets I thought the original idea was to build them out of scrap which I have done, I swapped an old XL125 bottom end for a chamber carb and throttle assembly


Now dont get me wrong I am not wasting anyones time on here gettign them to give me all this advice and im like F$&k that I wont do that,

No I want to try things out and whats a better bike to do it on than a bucket,
It would cost me money to get the steel the welding done etc for a chamber that could buy me new RS125 tires.

What I like about my bike is that it is, A Kawasaki ZZR250 Chassis, A AX 100 engine mounted in using part of the standered AX frame, A Tail Peice of a 1990 RS125 Honda A Expansion Chamber of a 1980 RM80 and porting done in my garage by doingtrial and error to me that is the fun part,

What I love about buckets to me isbuilding them out of as many different bikes as possible ask RG100!! I allready go with him down to mates swap parts with him.


I do want 2 stroke perofrmance tuning except its more dollars I have to spend I have borrowed and from reading the first chapter I really learnt alot


Now my babble is over that none of you will understand I best be getting back out to the shed for some work

[Skunk]

Now my babble is over that none of you will understand I best be getting back out to the shed for some work

You'd learn more, faster, if you first read then try.

[Ivan]

Hey SKunk youl be a happy man I scored a copy of Rua,


THANKS mate,

Its on its way in the mail cant wait to read it

Bling coming your way to mate

[F5 Dave]

Well this all seems a good time to talk about our new kittens . The wife was very keen on getting two & names ‘her’ one Dangermouse because, well it’s an odd name for a cat. I got to name one. Kaaden.

Not that I told her but named after Walter Kaaden. If you googled it you would probably find out that he is largely credited as the architect of the modern performance 2 stroke engine. He largely is responsible for the expansion chamber. Read up how they work.

All that pipe will do is make nothing else you do make sense. Speedpro is a bit diplomatic saying it is too short. He should have said -It is Waaay too fucking short! The header doesn’t look like a header & there is no dwell. Conversely the stinger is too big a diameter for a 100.

An engine is a package, if all parts don’t match each other then none will be working well.

[Ivan]

ok Dave,
I have been for a ride on it but the thing was running too rich, Adjusted mixture screw but made no difference so I need to change the jet one size down,

Well even running rich, I still got clocked at 100 KPH.


It does stand up wheelstands tho but then humming it along (tell a liewas actually doing a burn out) the wodruff key snapped clean in half.

I thought id blown a piston by the noise it made.

Any way my 2 stroke tuning book has arrived thanks RUA

[F5 Dave]

Woodruff key will only snap if flywheel loose or not sitting right. Key is only for assembly purposes, not to hold it in place. Just look at any engineering equipment with a taper like a drill chuck.

If the tapers are made for each other (there are several different tapers/sizes between bikes) they can often be cleaned up with valve grinding paste & work back & forward then clean well.

[Ivan]

Keep it quiet its the one RG100!! made for me whilst he was here it snapped doing a burnout

[gav]

Reed valves, anyone run a 100cc two stroke, with a 28mm carb without one? Does it really make much difference? This is a MB100, so no rotary valve comments please, just curious what the effect would be....