Alright I bought a MBRP race slip on and a dyno jet kit. I jetted my raptor to there specs. (dynojet) 3000ft - sea level I went with a 144,146 ran the bike it ran great no dead spots or boggs but the plug was showing lean it was grey not white. So I asked a few people on here and they said go up to the 146,148 set of jets. I did this yesterday and ran it for about 10-15 minutes and the checked the plug. It isn't showing anything or at least I can't see anything. the part of the plug that was grey now has a yellowish tint to it no more grey or black. Is this right???????? Thanks

 

What kind of air box mods? 5 or 10 minutes isn't going to show much.

 

No air box mods I just trimed the snorkle

 

I would think the jets you had before would be alright but it did sound like you where a little lean by the discription of your plug. Run it for a few hours and check your plug again.

 

I would say your jetted perfect now.