I am troubleshooting a problem with an 1997 Polaris Scrambler 500 and I could use some help. It will start and idle with no problems. When I give it throttle, it sputters, cuts out, backfires, etc. (very similar to having water in the gas). I have done the following: cleaned the carb & checked settings/jets (it is perfect), adjusted fuel screw (no change), checked intake for leaks (all good), replaced & gapped spark plug, fresh fuel, new fuel filter, fuel pump holds pressure and appears to be pumping fuel, exhaust is not plugged, air filter is in good shape, cam chain tensioner & cam timing (good shape), pulled the black wire on the rev limited (no change), added a battery charger to see if voltage was causing problems (no change). I ran a leak down test and found that I am leaking approx. 10%. I could not detect air coming out of the intake or exhaust ports, so I am assuming that I am leaking past the rings into the bottom end. Another thing I found was that the valves were very loose. They should be at .006" and the clearance I measured ranged from .008" to .014". I believe the exhaust side was the higher measurement. Would the rings and potentially worn valvetrain cause this issue? Should I look elsewhere, like at the stator? Any help is appreciated.