I have 1994 Fourtrax here is my problem Cranks, reacts to throttle and choke just as it should, drive for a few minutes and when you come off RPMs it starts to stall and die. Cranks , but reacts poorly to throttle and choke, dies and occasionally backfires. At this point it doesn’t matter if the engine is in neutral or first gear, same reaction. Gas cap off and rotating petcock from on to reserve doesn’t change anything. I have drained and cleaned the fuel tank, installed a new air filter, installed a new battery and twice cleaned carburetor with no change in the performance, any help is appreciated