Jet rich and work your way down.
I would start 1 up on the pilot with the airscrew 1/2 turn out from closed. You may want to lower the needle clip 1 position. Go up at least 2 sizes on the main.
After you get it warmed up, check the spark plug immediately after a hard full throttle run. If it is medium to dark brown you are rich enough. If it is very light tan, you may want to richen it up.
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Eric K
'06 GasGas EC300
'01 GasGas XC300
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