Jetting

[04exking]

I have an '08 450er and I am about to do the "green wire mod", and install a Uni air filter, and my Dasa pipe. My question is about what size jet do I need. I am going to buy a jet kit tomorrow but if you could give me a good place to start that would be great. I live in Yuma, AZ if that helps. Also it is probably going to be a DynoJet kit if that makes a difference. Also what is is the stock jet at right now? (MAIN JET)

[400exrider707]

Yes it does make a difference if they're dyno jets. A 160 dynojet and a 160 kehein jet are actually two different sized jets. Here's a chart to help you.

hole-----Kehein #--- DynoJet #---Mikuni #
0,0570----147,5------136--------127,5
0,0580----150--------138--------129,4
0,0590----152,5----- 140------- 131,3
0,0600----155------- 142--------133,1
0,0610----157,5----- 144------- 135,0
0,0620--- 160------- 146------- 136,9
0,0630--- 162,5----- 148------- 138,8
0,0640--- 165------- 150------- 140,6
0,0650--- 167,5----- 152------- 142,5
0,0660----170------- 154------- 144,4
0,0670--- 172,5------156------ 146,3
0,0680--- 175------- 158------- 148,1
0,0690--- 177,5----- 160------- 150,0
0,0700--- 180------- 162------- 151,9

[04exking]

alright thanks i couldn't find a jet kit so i had somebody help me lol