I went riding on sunday and I noticed my raptor wasnt running as strong. I think its time to re-jet. Its gotten a lot colder here 60°F(used to be 100-115). What would you recommend? I havent put in the Hotcams or Wiseco piston yet. Just got a K&N, E-Series pipe(no spark arrestor) and Nology Plug Wire. I noticed last night that my header was glowing after I let it idle for a couple of minutes. Help me out guys!

 

You're starting to run lean. I don't know what jetting you have,nor am I familiar with the raptor dual carbs, but when it gets colder, you need bigger main jets. Read your spark plug, it will tell you if you are lean.

 

cali, one jet size up in each carb should be pretty close for 40 deg. change. watch your plug it should show what you need. If thats not enough or the power loss in in the middle of the throttle range richen the needle by one notch on the clip.

 

How do I read my plug? I think my top end is sorry as hell, I tried going up a hill and couldnt and my bud's raptor was going up like nothing!

 

160/165 needle in 3rd is what I had with your setup. but every bike is different so tell us what you have now so people can help.

 

You might even try 165/170 mains

 

Right now Im running 144/146 DJ Jets...my kit only goes upto 148/150 but I can get some jets from my dealers tomorrow...I think I found my problem...I took off the 2 little black covers on top of the carbs and found a spring was broken (Spring, diaphragm according to my manual $5.17) what could have caused this? and what does this little spring do? If someone gives me their email I can send you some pics of this. Now, do I have to remove the carbs comepletly off the quad? This will be my first time re-jetting so be kind guys!

 

I would put in at least 148/150 without the lid.

 

I stripped 2 of the 8 screws on the bottom of the carbs (one on each side)...anyone got any tips besides an ez out?

 

I used a small pair of vice grips someone else posted that they used a pair of wire cotters to grab it from the top.