Hey everyone,

I just bought a used 03 Raptor 660. The guy I bought it from said it had a 750 big bore kit on it. He said the stock carb jets are still installed on it. He said I need to have it rejetted and it will be more powerful but also eat more gas.

It was working fine for a couple of weeks. Now all of a sudden whenever I have it wide open it cuts out. My local ATV mechanic said I need to rejet it, but with it being a 750 big bore kit he doesn't know what size jets to use. Does anyone know what size jets I should use? The guy I bought it from said he doesn't know what brand the big bore kit was but that the piston was a wiseco.

Any help would be appreciated because I am starting to regret this purchase.