Discussion Starter · #1 ·
First off im new to the site, but not to the atv world. Just got this 2000 400ex that needed full rebuild, so ended up doing stock bore size Wiseco 11:1 high compression piston, fully ported head, ground the welds on the stock header, white brothers E series slip on, k&n filter, no lid, rev box, and a hotcams stage 1. Bike has jetting at 170 main and 42 pilot, not sure how its going to run. Elevation 69' above sea level. Was wondering if someone could give me a good round about on where the jetting should be with all the mods being done.