C
Check your fuel pump. If fuel is getting into the impulse line, it will dump into the mag side crankcase.
wouldnt this be painfully obvious somewhere?
how do we check the fuel pump? I know the basics of what makes a motor run and basic diagnostics... but this is my first year ever on a sled.. got into the sled world february 2017!, so some parts and their locations are still a tad foreign to me. wont take me long to master these things though. im already off to a decent start with 2 rebuilds under my belt...s mod replacments, new running boards (scary cutting up your tunnel), new rails, etc.. and this headache.
it ran great in the shop.... even ran great on the trail. for 5 miles. then died!!
owner bought it, rode it for a few hours, ran great, did like a 2 minute hillclimb, and it sputtered on the way down... been a nightmare ever since.
coil and plug wires are on the way.. well try that.
if that doesnt work, its DPM testing/replacement and carb rebuild. maybe even Raves. would like to know more info on that o ring. id bet its a super oddball, rare size with my luck. and I cant seem to find it on the parts explosion.
if that doesnt work.... I give up!!