Hi guys, it's winter and I want to mess about with a good thing at night - naturally my header came to mind. I'm keen to extract a bit more power out of my standard FXR engine. Does anyone have some good dimensions for me to fabricate a higher flow header?
Currently i have an OKO28 and the muffler is under slung below the belly. The header is shorter but stock diameter. The muffler is still just as muffly, but i shortened it a each end to remove the chambers (not having any idea what this would do to the flow, but I assume the most important characteristics come from the header shape). Engine internals are stock (worn).
I found this from an old post on www.fxr150.co.nz: "Approx 460mm overall header length, 32, 35, 38 mm o/d approx equal lengths worked well on my previous FXR." This advice sound good enough to go waste a whole lot of time doing?
Once I make a header, i hope to correctly jet it and maybe dyno it.
Cheers,
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