yfz450ba
07-17-2009, 08:38 AM
I have an 08 raptor 250. I purchased a full pipe system from HMF. I put it on and with no jetting it ran great( air lid on). So, that's were I should have stopped. But no, I decided to do the jetting for the airlid off. Did the 170, and 30, put it back togeather. When we took it for a ride, there was no power. ran good, but no power. So I put everything back the way it was, again the same no power. Bought the GYTR jet kit, changed the needle, everthing they said to do, still no power. (note: runs the same with air lid on or off.) What am I missing? Air leak? I checked the rubber boot between the cylinder and carb, no visible cracks. No matter what I do, jets, needle, air lid on, air lid off, it still runs the same. Help