I know, expansion chambers are the way to go for performance. However, they need to be custom designed for the engine and a certain RPM.
That's pretty easy if you have a YZ250 or some common platform, but what about us engine swappers?
I have been looking at motorized bicycle junk that claims to "go better without too much noise".
I have funnels, recently purchased a megaphone from a member here, but there is a difference between free breathing exhaust and a chamber.
Header pipes from 4 stroke 212 junk do NOT work well on 2 strokes. I have been looking at performance "race" chainsaw parts.
Has any of you ever messed around with "tuning" the exhaust on old 2 smokers? I'm planning to try making one of these. I'd like to make it adjustable, for testing purposes. Please tell me if you have any experiences with anything like this. Thanks, Dave.

That's pretty easy if you have a YZ250 or some common platform, but what about us engine swappers?
I have been looking at motorized bicycle junk that claims to "go better without too much noise".
I have funnels, recently purchased a megaphone from a member here, but there is a difference between free breathing exhaust and a chamber.
Header pipes from 4 stroke 212 junk do NOT work well on 2 strokes. I have been looking at performance "race" chainsaw parts.
Has any of you ever messed around with "tuning" the exhaust on old 2 smokers? I'm planning to try making one of these. I'd like to make it adjustable, for testing purposes. Please tell me if you have any experiences with anything like this. Thanks, Dave.

