Backfire

jacksoj · Jun 12, 2003

What could cause a bike to backfire? I'm helping my neighbor with his XL600R. It started out losing all spark. We just put a new stator in it, which restored the spark. We got it started tonight and it fired up. After letting it warm up for a couple of minutes, he killed it to check the oil level. Afterward, we couldn't get it to start with the kickstarter. We pulled it behind a quad to get it started, but it would backfire sporadically out the exhaust. None of the manuals I have say what to check if a bike backfires. Anybody have any suggestions on what to check?

Thanks in advance

atc3434` · Jun 13, 2003

Sounds like an issue with the timing if you ask me... perhaps when the stator was replaced, you didn't get the timing set back properly.

Kornholio · Jun 14, 2003

Yeah, i would suspect you havent titghened the stator retaining bolts at the edge properly. Check the position of the stator using the predefined marks at the edge. When you've started the bike originally its probably worked it's way loose knocking the timing out. Let us know how you get on.

jacksoj · Jun 25, 2003

We finally had a chance to tear into it tonight. The stator bolts were tight. Nothing had slipped. One thing I'm curious about is there was about 1/2 a quart of oil under the stator cover. Is that normal? Could there be a leaking seal that's causing an electrical problem because oils getting over everything?

flynbryan · Jun 26, 2003

Originally posted by jacksoj
Could there be a leaking seal that's causing an electrical problem because oils getting over everything?

Yup. That should be an enclosed area, with no Oil/water coming into contact with this part of the motor. You've got a bad seal.

Backfire

jacksoj

atc3434`

Kornholio

jacksoj

flynbryan

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