I worked on my 02 raptor all day yesterday. After putting about 15 hrs on the bike, I stripped everything down and started by changing the oil and adjusting the valves. Then I installed the full Yosh system. Next I put the dynojet stage 2 kit with 148 and 150 mains and clip in 4th position. I then cut all the excess plastic out of the stock airbox and installed the Pro Flow kit with a K&N Filter. I am running it without the lid. I ran it for a few minutes in the hills by my house and DANG!!! This thing rips now.

I didn't check the plug for color. It does not seem to have any stumble and it continually pulls. My pipes never turned blue, but I didn't run it very long. My pipes stayed a nice gold tone. Can anyone tell me how to make sure I don't have a lean condition anywhere in the throttle positions? Is checking the plug is the best way to tell????

Overall extremely satisfied with the results, I can't wait to get it out to Glamis next season and give some banshees and DS's a run for their money.

 

1/2 throttle will tell you the needle position, full throttle will tell you the main jet.

Yes, the best way to check the jetting is with a plug check.
Shoot for a golden brown to a brown paper bag color.

Only use a FRESH WHITE plug for the plug check, or you might not see a lean condition!

 

You should probably check your plug. I am running the EXACT setup that you are except I still use my (vented) lid. My elevation is below 1000'.