z400

[hillbillyjr]

yea i have a 06 z400 with hmf slip-on, jetted,and k/n and i was wondering what else i could do to it to make it run with a 660 raptor i really do not want to tear into the engine. i race a 300ft drag strip. thanks

[jonboy]

Get a full exhaust, and do yo have airbox lid removed? You can try several passes with gearing changes and maybe even try getting better tires. If your launch goes up in wheel spin thats half the race already.In the end, there is no replacment for displacement:p