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.
