Once you get it right keep sea foam in your gas and it should prevent it from happening again. Pulled the carb and removed the mixture screw. The idle circut is cleared and it did not fix the problem.
Went first two turns out the three turns out. It adjusted the idle, but did not get rid of the backfire. Sounds to me like they might be a tooth or two off. Not hard to do, especially with that motor. Factory Certifications in Suzuki and Yamaha. Re: 07 Raptor Backfires Then Dies 5 Unread post by agraebner » Thu Sep 08, am It sure sounds like a valve issue then since you have ruled out a lean condition.
Maybe a burnt one from bad clearance before or an improper adjustment. Another big issue on air cooled engines with bad fuel is it can build up gunk on the valve stems and stick them or make them sticky or slow.
I see this a lot on briggs ect.. The ground strap on the plug is white indicating lean. When I changed it last the old plug looked like it might have been a bit rich. Anythoughts on where to look for my problem? I thought about a compression test but ill have to hunt down the correct hose to fit the head. Thanks for the input. My bike does the same thing. I noticed on the other side of my head something like that. MotoArts Well-Known Member. Have you tried to retorque the head bolts?
Can't hurt. They don't take very much torque, probably because the bolts are so long and thin to begin with. I got a compression tester hose that will fit so im gonna try and check that tonite. Theres no oil leak from the head gasket area. The cylinder base gasket is staring to get some oil seepage on the other side.
I guess I could try and retorque the head bolts. I didnt think that was the best thing for headgaskets. But its worth a try. As long as the gasket s aren't blown out, then yes it's ok.
Bolts strech, and can back out from heat cycles. Overtorquing is worse than undertorque I'd consider checking for a possible burned or sticking intake valve. Might show itself on the compression check. My warrior was doing the same thing before I rebuilt the whole topend, still doing it.
Someone said if the pulse coil is shot it will cause similar symptoms. From what I've found. You will hear the air blow the slide back because the change of pressure difference. So that is why you hear a clicking sound. Anyway, I would make sure the carb is adjusted to factory settings first on the fuel screw.
I believe it is 2 turns out. If you are running more open filter and exhaust you will have to back this screw out. To set this screw perfect. You just idle the engine up to about rpm. Turn until you get maxium rpm and smoothness out the engine.
Other things it could be if this isn't the problem are.. Joined Mar 24, Messages Reaction score 0. Mine does this when its cold and warming up it kinda like coughs back into the intake but still runs. Would that be pilot or main or both? Yea the fuel has to be turned out to almost falling out, so about 4 turns before it quits or runs decent. I thought it might be way too lean on the pilot. I just fooled with mine, again, for the 6th time. Honed the Fires up much easier now.
I have a 45 jet -on backorder-??? I'll probably just cancel it and order it online. Just an update on mine. I swapped the main jet to the bigger one out of my carb.
Cranked it up and it runs fine. It seems theres an issue in my carb somewhere. Either somethings worn out or its got a clog in it somewhere.
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