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Old 07-02-2010, 10:10 PM
KCvale KCvale is offline
Motorized Bicycle Elite Member
Join Date: Feb 2010
Location: Phoenix,AZ
Posts: 3,554
Default Re: my exhaust system. will it be ok?

In a word, no, it won't be OK.

The exhaust on a 2-stroke is actually part of the intake too.
This animation from SpookyTooth shows you better.

With no expansion chamber blowback of fuel it goes out the tailpipe polluting like crazy, and it cuts your power and mileage drastically.

I suggest you use a real pipe, then just add your mufflers after it.
Just go real wide right after the little expansion chamber exit hole so as not to restrict it too much.
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