Went riding last night, and on the first long straight trail i hit, she was held damn near wide open. After about 20 seconds of that, it started bogging down, and backfiring. Going through trails, she ran like a top. But on the long straights near W.F.O she didn't want anything to do with it. /i would let it sit for about 10-15 seconds and it would fire back up. It seems like it's getting too much fuel. Any Idea's guys?

 

Might not be getting enough fuel on long runs (starving,bogging down) check fuel filter,also you can check flow at carb by disconecting fuel line and cranking over,should be a fairly good stream. Check the vacuum line leading to carb also. Also have found trash in a few needle valves over the years that limit flow. Or could be diaphram/slide in carb. Might help,dont know??? OPT

 

it does sound like on top end where you said it was back firing that it was running lean cause of what he ^^^ mentioned. how did the plug look after the wot run?

 

I havent pulled the plug yet. I am going to be lazy about it, and run some lucas through it. It just blows my mind that it is so out of the blue.

 

Jets in carb maybe partly plugged.

 

Thats what i am hoping for. I just got this 4 wheeler 2-3 months ago, and it was running rough. I have been running lucas in my gas and up until i stopped, which was one tank ago, it has been great, so i am gonna try a little more today