I have a 96 Indy Trail touring and it hada 488 fan before i lost the motor last spring. So i replaced it with a 440 fan and now at full throttle it spits, sputters and backfires. It does get a little worse when it warms up but i dont think that it's overheating. I have cleaned the carbs and but in new plugs (BR9ES) but it has not helped at all. If anyone has any ideas it would be great. Thanks
