killer400ex
04-03-2009, 11:27 AM
ok so i just got done re-building my 400ex and it now has a 426 11:1 wiseco piston with a stage 2 hot-cam and a full hmf exhaust, i also had a 5 angle valvejob and installed a k&n air filter with no lid, i am at 400 feet above sea level. i have been trying and trying to jet this stupid thing right, i get it warmed up barely and then it is a game trying to get it set right, and when i get it right and i go back out the next day it runs like crap even after trying to warm it up, i am just wondering if someone had something close to my mods and if they have any suggestions for jetting this thing, cause im about ready to say screw it and sell it, racing season is starting up here and i dont have time for this