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My son's 2012 has never ran all that great and after a disappointing trip to st Anthony dunes I decided it is beyond my skill to figure this thing out. Problem is I am in western Montana where the dealers have never seen a yfz let alone tune one with a slip on and various elevations. Anybody know a shop that could handle this within a couple hours of Missoula or a owner that I could pay that knows the mikuni? Or should i buy a kehin? Appreciate any suggestions.
 

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2012 YFZ 450, big 3 for mods.
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My son's 2012 has never ran all that great and after a disappointing trip to st Anthony dunes I decided it is beyond my skill to figure this thing out. Problem is I am in western Montana where the dealers have never seen a yfz let alone tune one with a slip on and various elevations. Anybody know a shop that could handle this within a couple hours of Missoula or a owner that I could pay that knows the mikuni? Or should i buy a kehin? Appreciate any suggestions.
I run the HMF recommended settings in my 2012, which is only a 165 main (everything else factory), open air box, and a Pro Circuit T-4 slip on. I ride at fairly low elevation, and it runs pretty much perfect. The HMF jet kit came with 3 main jets: 160, 165, 170. Maybe at elevation, the 160 main and open air box might be the solution.
 
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