Question about the AP

My yz250f is mounted on a kart, so i continuesly ride to 13.000 rpm, change gear and wack the throttle untill 13.000, change gear, .... i always wack the throttle, waht is the good setting for my AP ? a smaller leak jet ? AP timing screw ?

Every engine is different but most of the time a #40 leak jet will solve the problem. For me, a #40 leak jet and a few turns out from full on the timing screw solved my problems.

Since you are in a different country I think the first thing to do is remove the float bowl and see what leak jet you bike has stock. Then try other jets from there. It is a cheap mod and will only set you back about $10 american per jet. I am not sure what it will cost you in Euros.

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