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Jetting a 02, CRF 450 w/ a New FMF Pipe.

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The stock header pipe cracked on my 02, CRF450 so I am going to purchase a FMF powerbomb Titanium header pipe and a new FMF exhaust can. My question is what size should Jet needle should I use. I ride the California high desert and Baja Mex. :applause:

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Ask this question if you have an issue after the exhaust is on. More often than not the stock jetting will work with maybe a fuel screw adjustment.

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