BansheeRider

so to figure out which jet needs changed, do run it low rpm and look at the plug

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gscx

ust feel how it runs, and as for racing. the classes are like this. 122cc-250cc A,B,and C class. it doesnt matter if your bike is a 4 stroke or 2 stroke, only the displacement matters. and then there is a open class that goes like this. 122cc-500cc, any bike can ride in this class, this is usally what i have the most succes in. and they dont make a high comp piston for 2 strokes. all they do is use a thinner base gasket. get the thinner gasket . but send it off to get it ported, this is the best way to gain power, or not so much gain it, but tailer it to your preference. you cant do this yourself because you have to change the angle that the ports go into the cylinder.

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199? KX60- Bone stock and in process of complete rebuild and restoration

turtlemann14

yea, run at low rpm for a minute or two check plug
mid rpm plug
high rpm plug

that will get you pretty close
but you have to shut your bike off asap or the lower rpms will change the plug reading
and i can't remember if you are supposed to have a load on the engine or not

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tigmaster

TJ I wrote an article on this called Jetting Your Ride. Read it if you haven't.

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