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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through March 20, 2008 » Weird powercut then backfire « Previous Next »

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Jc000
Posted on Thursday, December 13, 2007 - 03:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just picked up my 2002 M2 from a two-week "vacation" at the dealers... they were fixing a leaking shift shaft (for the fourth time).

Anyway, dude brings the bike around, choke out, bike off. I turn the bike on, ride off the lot, turn onto the main drag and the bike totally cuts power, like I can feel the power almost draining away. Just as it's about to "shut off" (so it feels) the bike backfires louder than it ever has before—sounds like a gunshot. Revs pick right back up and the bike seems ok after that.

Any ideas? Anything I should be worried about? Bike is stock except for the pro intake and carb rejet.
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Bad_karma
Posted on Friday, December 14, 2007 - 02:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Jon
Was the enricher still out? Sounds like maybe a jetting problem. Also air leaks such as intake gasket or exhaust leaks.
joe
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Jc000
Posted on Friday, December 14, 2007 - 10:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yeah, the enricher was still out... I just installed the intake (not too smoothly either) and I'm wondering if there is a leak there. It seems to run fine otherwise.

An intake gasket leak would really be bad as I don't know how to "correct" that. I had a lot of trouble getting the intake on, of course, I am inexperienced.
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Bad_karma
Posted on Saturday, December 15, 2007 - 12:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Jon
Search the board for methods of how to checking for leaks, it's not real hard. Great thing about the bikes is how simple some things are designed. Do a good visual, if new gaskets are need try again. I use a lite spray of silicon on the intake surfaces to prevent the seal from grabbing. Take your time, evaluate at every step and you will be successful.
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Buell_bert
Posted on Saturday, December 15, 2007 - 05:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

An easy way to check for intake leaks is to spray carb spray around the gaskets and see if the RPM,s change.
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