octogonal expasion chamber:devil:
so today i was in policecustody for riding a 47cc mini bike on the streets at the age of 15 aparently im fooked due to no licence registration speeding blowing off a stop sign and riding "wrecklessly" well now that thats over with i plan on making the wee littl bike faster. im goin to build a new frame with non crap welds and over all larger so i can actual put my feet on the pegs, i want to know if building an octoganal or similar shaped expansion chamber is sensible. i have all the tools except a pipe desinger to get dementions. is cone shaping the only way to get efficent flow and preasure waves? let me know thanks
2001 300EX
FMF Powercore4 Full
(no spark arestor)
20x11x9 Holeshot HD's
Uni Filter (no lid)
ProTaper bars
14t front