So I bought a 96 Bayou 300 4x4 a year or so ago. I finally got around to working on it. It ran and drove on choke but clutch slipped. I started working on it now after sitting for a year and I had to put a starter solenoid and starter on the Bayou. I replaced the centrifrugal clutch. I got it to start and idle but the carb was really gummed up. I cleaned the carb a few times but wouldn't start up again. I bought a Amazon carb and still no start. Only backfires through the carb! I went to adjust the valves and the flywheel mark is 90 degrees off from the cam gear timing mark for TDC. What would cause this?