Header pipe

how do you fix a loose header pipe without buying a new one, its powerbomb fmf, i had the head ported and polished and that could be why its like that. the bike is backfiring quite a bit and is also a bit lean, thx for the time

I don't want to sound mean but did you maybe forget the exhaust gasket?

Yep, there is either no gasket or the gasket is damaged at the header allowing air to enter and lean it off.

Also check the gasket between the headpipe and the end can while you're at it.

+3 on the gasket.

I have a new OEM head pipe for an 05. PM me and make an offer. Oh wait, mine is OEM sorry

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