I have a 2003 raptor 660 r an it idles fine but when u give it throttle it starts spurtin an popping. an i have gas getting into oil an overfilling it.

Looks like a blown head gasket.

i dont understand your question. should have sight glass on engine or a dipstick . check level by removing dipstick if equipped . check w engine cold before starting every time you want to ride. should be inside full marks or you can damage engine. sight glass should be full of oil if you can see silver inside glass dont start or ride. damage will occur.

Make sure that the shifter did not move out of N. Recheck your battery connections.

This is a timing issue. The crank and cam are out of time. It might be excessive wear,

clutch burned up...sounds like it. pull the clutch cover off and inspect it.

Has this ATV? been sitting for a while? Sounds like a typical need for a professional carb cleaning!!

The condition is call vapor lock.
Is there any missing heat shield?

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Use a bottle of yellow HEET dry gas to remove any moisture problem in the fuel.

Hey Josh,
Cleaning a carb is a little more that most people realize..it takes someone with knowledge and training to really do one right... take it to a professional..

clean the filters on the petcock?

hey,
Maybe your break calibars could be sesede.