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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Exhaust: Headers, Muffler, Gaskets, Supports » Archive through April 30, 2008 » 07 xb12r,race ecm,buell race pipe, popping and backfire??? « Previous Next »

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Hospitalfood
Posted on Friday, November 09, 2007 - 12:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ok, had to mod the pipe to fit it but not in a way that changes the back pressure.
no leaks in exhaust join.
tps reset.
backfires a lot and always pops from 4000/3500 rpm down when decelerating/engine braking.
about 3000 miles on the clock.
is this normal???
will it harm the engine???
ride everyday, lots of miles, thinking of going back to standard........but i do like the extra power.
please help.
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Diablobrian
Posted on Friday, November 09, 2007 - 09:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

check for leaks at the intake seals too.
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Sparky
Posted on Friday, November 09, 2007 - 11:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check for a missing or cracked rubber plug on vacuum port below throttle body if a non-Calif model.
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