I normally ride my Warrior with a 155 main jet at about 2500' elevation, and it runs great. I took it to the dunes today(sea level) for the first time since rejetting, and I know it's a 4 choke, but it didn't feel like it was running as well as it could be. Would moving up to a 160 main jet be a good idea when I'm on the dunes? Thanks.

 

If your bike runs clean at 2500'. I'd think it would be lean at sea level by possibly two sizes, so it may be wise to try a 165 first. As a (very) rough rule of thumb, one size main for each 1200'of elev. change.