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Buell Forum » XBoard » 07 12R - detonating in muffler « Previous Next »

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Mtnmason
Posted on Monday, July 09, 2018 - 11:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Not sure if you can get much from the video, but here it is running:

https://youtu.be/xoRAR-xQjCQ">https://youtu.be/xoRAR-xQjCQ" type="application/x-shockwave-flash" wmode="transparent" width="640" height="390">


Last time it was ridden was 11/25/17. I clutched in and it just randomly died on me. I was able to jump start it and that's when the detonation started. I had to ride it about 10 miles home doing WOT in 3rd and 4th gear.

Starts up no problem, timing doesn't sound off. The coil/wires/plugs have all been replaced within the last 2-3 years.

Thanks in advance if you have any ideas.

edit: here's the link since I failed on the imbed - https://youtu.be/xoRAR-xQjCQ
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Natexlh1000
Posted on Wednesday, July 11, 2018 - 10:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Perhaps something wrong with an exhaust valve?
Messed up seat or maybe hung open a little?
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Natexlh1000
Posted on Wednesday, July 11, 2018 - 10:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Actually, the more I think about it, If one spark plug wasn't firing, the air and gas would go on into the muffler to be ignited sometimes by the other jug.

I think the first step here is to determine if one header gets hot first when you start it up.

You may just have a bad plug or some other dumb cheap thing.
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Mtnmason
Posted on Sunday, July 15, 2018 - 11:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thx, Nate. Prob shoulda messed around w/ it before posting. Hope to have time to do so soon.

I've been a bit worried abt my VR, for... reasons and thought that may have something to do with it shutting off.
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Gabby_duck
Posted on Monday, July 16, 2018 - 03:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Pull front spark plug is it fouled?
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