Pre chamber length....

Yesterday I tried my bike with the pre-chamber length reduced from ~13" to about ~10". Mainly in an effort to gain high RPM power - shift the power band up.

BIG mistake - I lost ALL low end torque, had nothing midrange, took forever to come on the pipe.....and even didn't really seem to have extra power. I even took my new muffler off. No really help. I was very surprised how much a pipe , or rather the pipe tuning effects the pipe.

So I put it back the way it was +3/4".

I guess I got a little wild.

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Guess I should have been a little clearer when I said shorten your pipe to gain more power in the higher RPM range. Just so you know when we were racing Karts we would change pipe length in 1/4" increments not 3" at a time.

lol. Baby steps, Pablo

Seems like a slip fitting would make it easy to adjust to what you're looking for. You could even mark settings out so if you wanted a lot of torque for motoring up a mountain one day, you could easily set it. Or if you just want to go fast another day, another easy change. Once you've got it all figured out that is

That just makes too much scientific sense. I was messing with aligning the darn thing and trying to keep it from hitting the pedal, the tire, etc. I got the silly muffler back on (you didn't laugh).....I just ate some left over Korean beef, I'm going for a ride after I get caught up on the web.

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And we know how this story ended....bike ran like crap regardless....it wasn't the length, it was fuel gone bad....

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