Hey guys, Already learned alot on this forum and I've been searching for a similar thread but couldn't find one. Sorry if this is a repeat, here's my situation: I'm getting ready to take the drz across country from Virginia to Arizona, ranging from sea level elevations to 10k feet. Most of the riding will be around 3-6 thousand feet. What do you guys recommend I jet my Mikuni carb to? I tried rejetting it the other day by using other people's setups as a guide but it is running less than ideal (loss of power from 3/4 to wot, and heavy backfiring) Please Help!!! 2001 DRZ 400s Mikuni Carb 3x3 mod, slip on exhaust currently: 142.5 main jet, 22.5 pilot DJ needle with 3rd clip in fuel screw 3 turns out Any advice is greatly appreciated, thanks.