Maintenance & Technical > KX250 / KX125

1998 kx125 tuning HELPPP!!!

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kx92nateee:
i have a 1998 kx125 i have a pro cuircut platinum pipe and r304 silencer i jus need to get the tuning right for max power.......i need advice maybe a chart for click position on needle and fuel to ar ratio screw and i run 52;1 mix thanks..

Hillclimb#42:
Pro Circuit is sayin' stock is a 160 main, and to change that to 158. Leave the stock 42 pilot and change the clip to 4th position. Stock is 3rd. Start at 1 1/2 turns out.
 Pro Circuit and FMF have jetting info, and have been close for me.

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