Carb jetting for x2

[Jburns1331]

I have an x2 with a 650, factory b pipe, and 44 carb anyone know what the jetting should be


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[kevbo]

I have an x2 with a 650, factory b pipe, and 44 carb anyone know what the jetting should be


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That is difficult to predict. The engine should be fourcycling a little around 1/4 throttle and the top screw should be set a few rpm rich of peak, or for best acceleration which is usually the same. The common range is pilot 120-130, popoff around 20psi, and a 150-170 main depending where the top screw ends up.

 

[stagesrt4]

2.0-2.3 needle/seat
120-130 pilot
150-165 main

silver spring i believe