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WilfulLemar20

Fmf mega bomb header

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Okay I have a 04 yz450f and it has a fmf mega bomb header, now where the header attaches to the head of the engine it has a flange that bolts on but it does nothing to hold the exhaust on the head, there are 2 springs that hold the header it's self in place. Are the springs really the only thing that hold this together I will get pics after work to better describe thanks

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Usually the flange is part of the header and is above the part that is expanded, like the pic below so that tightening the flange pushes the header up onto/into the exhaust opening.  :confused:

 

X001-Y035.jpg

I know that's not the same year pipe.

Edited by jcm3

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Not on the FMF.   The flange is a separate part that bolts into the exhaust port.  The pipe then slips into it and is held there by springs attached at two points on the pipe and up to 4 on the the flange.  (See arrows)

X001-Y035.jpg

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Okay that's a relief thought it broke as it has a couple dents on the bottom I will be buying new springs anyway these have seen better days

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