possible sliding exhaust?

GoldenMotor.com

rustycase

Gutter Rider
May 26, 2011
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Left coast
I've seen that before, IP.

It might be a great idea for a straight-line racer.
...someone going for top end, but still needing to get off the line...

A shorty xchamber will give biggest boost at top end, and a long one the best torque at bottom end.

Sometimes I wish I had not learned all this stuff the hard way. lol
Way back when I bought a shorty xchamber for my DT-1 trail riding bike cuz it was $10 cheeper than the stoopid looking loong one. Boy did it come on the pipe! lol
Marginal on the bottom end, where I really wanted it...

Best
rc