My raptor starts great and idles great as well but when i shift into first gear the engine revs fine but the clutch is slipping or something and when i start to go it just doesn't have much power. You might be thinking the clutch is burnt up but after like 5 mins of riding i get all the power back. Every time i start it cold it does this please help!

 

Still might be the clutch, after 5 minutes the oil gets warm and helps with the clutch, or might be the oil your using, also make sure the clutch cable releases fully on the crankcase.

 

I dont think that the oil is the issue considering im using yamalube but you might be on ti something with the clutch cable but I dont know how to fix it or to tell if it is not fully realeasing.

 

Check that you have free play on the clutch handle, usually 1-2 mm but check the manual for exact. Also inspect the clutch cable releasing, I'm pretty sure it is on or near the top of the crankcase in the raptor 350. I have a warrior and I'm pretty sure the engine is the same.

 

I checked and it looks fine Ill just bring it in to a shop and let them deal with it, hopefully its an easy fix. Thanks for the advice