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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through February 28, 2007 » Slight miss fire after header replacement on XB12Ss « Previous Next »

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Cadhopper
Posted on Sunday, September 03, 2006 - 10:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
I put the Jet Hot coated header on my 06 XB12Ss yesterday and all seemed to go well. I followed the instructions in the maintenance manual and watched carefully when I rotated the motor down into the service position and back up again to make sure nothing got pinched or smashed. After starting the bike I could feel a slight miss fire through the exhaust, it is most noticeable in the low RPM range. Once above 3K RPM you can barely feel it. The bike has also backfired through the air stack a couple of times when I twist the throttle quickly. I am not getting and popping through the exhaust during decel so I don't think I have an exhaust leak.

I took the air cleaner assembly back off and verified that everything was hook up properly and everything looked good. I did a 55 mile ride this morning to see if it just needed time to recalibrate the ECM but that did not help. Could it be as simple as a TPS reset or did I screw something up? Any suggestions would be helpful.

On a good note the frame is not getting as hot and the fan does not seem to be running quit so much.
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2k4xb12
Posted on Sunday, September 03, 2006 - 12:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Hmmm, maybe exhaust leak? Did you put new gaskets?
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Cadhopper
Posted on Sunday, September 03, 2006 - 09:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Yes I replaced the gaskets with 17048-98. Would an exhaust leak cause the engine to miss fire under a load? What would be the best way to check for a leak?

(Message edited by cadhopper on September 03, 2006)
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Desertted
Posted on Thursday, September 14, 2006 - 03:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Exhaust leaks are a BAD thing
Watch what happens when any naturally aspirated racing engine breaks the exhaust during competition. They go from first to worst in a hurry. Get some soapy water in a spray bottle, turn the kill switch OFF when the engine is dead cold, then,spray the suspected area like crazy with the solution, and crank the bike over for a few seconds, if there is a leak, you'll see bubbles

C'mon somebody should have said this by now
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Cadhopper
Posted on Friday, September 15, 2006 - 07:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Thanks for the suggestion, I'll try the soapy water this afternoon.
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