I just got finished jetting my 400. I am using a DynoJet 170 main. Do you think that is to big of a main jet?? I go to pick up my LRD exhaust and rev box tomorrow so I won't be able to try it out until then. I will be running with a K&N, LRD full system, rev box, and airbox lid off. I think the LRD system requires a 165 main but I followed the instructions of the jet kit and put in the 170. If anyone else has the same setup let me know what size main you are running.
05' YFZ450
BUB complete ti/carbon exhaust
K&N
*FOR SALE*03' 416ex
LRD full system, Rev Box, Cam,Valve Job, Jet Kit, K&N filter, Motion Pro twist throttle, AC front bumper, DG Alloy Series Nerf Bars, On-Dunes Performance light covers, Works Shocks, Lonestar axle, Douglas Beadlocks