1989 polaris trail boss 250 2x4 2 stroke problem.

[timberwolf357]

i added this video because its hard to explain what it's doing. i cant figure this problem out. i thought it was fuel. but its got good flow from the tank and i tried a different carb and got the same result. hiting the throttle doesnt change anything. it's driving me nuts. it has a new stator and coil.

[Mech]

Blocked exhaust ?

[timberwolf357]

i don't think so, sometimes it'll clear up and run fine, then starts acting up. 2 stroke smoke does come out the end. i'll look that over but i don't think thats it. thank you

[Mech]

If you have a timing light, fit it and check the spark isn't failing then resuming..

[timberwolf357]

i did put a spark tester on it while running, it has an orange spark, i'm not sure how bright it should be, and that won't show me if it's failing and resuming. i'll see what a timing light will show. thank you