pastorjeep

It only runs for one to two minutes, maybe less. I did try to rev it a little and it revved fine and then backfired and cut off. So I will go through the whole fuel system again this week. We have a worship team in town from Pretoria South Africa and hosting them is a round the clock task right now. Thanks

Mech, you are definitely on to something. The hard starting and kickback turned out to be a bad starter. So now it spins right over and cranks but will only run on full choke and still leans out and backfires after running a few minutes. So I put a new intake in it. It was a cheap one from the bay and it is poor quality. I think the main issue is a poorly jetted carb which is obviously not the original mikuni. I have no info about the carb from the po.

Thanks for the replies. Little update, I switched the pins on the stator and it fired right up...sorta. It still has the hard to crank syndrome like the valves are out of adjustment. The starter really complains trying to turn it over. If I keep hitting and releasing the starter it will hit a sweet spot and fire right up and idle decent with a little choke. But only runs for a minute or two and backfires through the carb and dies. It blew the carb off the boot. When I cover the carb with my hand you barely feel any intake suction. Stumped for the moment.

Hey guys, I just picked up a 09 Big Bar 250 that was completely taken apart. The owner was trying to fix a no spark issue. I put it all back together and sure enough no spark. I have had a Timber wolf, 3 Bear Trackers, and Bruin 250 over the years so yeah I like these things. After a ohm test on the stator sure enough dead pickup coil, so I ordered a fleabay special. I have put one of these on a couple of the other quads with good results. Anyway, the stator came today and I installed it right away. Quick check and sure enough nice spark. Hook everything up and no start, but a nice backfire through the carb. Clean carb,, no start. Check compression (120psi) no start. Hit it with starting fluid and it back fires real bad, you can hear the starter one way clutch complain. Try pull start and it really jerks your arms. I pulled it back apart and checked flywheel key. Lined up timing marks and they are spot on. Set valves to .004 intake, .005 exhaust. It seems like it is firing on the wrong time. But there is no way to do that, that I can see. Could the new stator pins be backwards? Would it spark but out of time? I am stumped. It doesn't even try to start just bad backfire through the carb. Ideas?