I hear stock jetting is about perfect for a yfz w/ an aftermarket exhaust at a high elavation such as I........I'm currently running stock exhaust w/o baffle/airlid and am going to get a sparks exhaust and am stock jetting.....has anybody on here fine tuned their jetting for about 4500 ft?

 

I have a sparks witht the sparks airfilter addon


170 main
stock pilot
4th on the needle
11/2 to 2 turns out screw

Thats what I had when I was in LS

I am at 5000 and left it at that too

purrs like a kitten

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