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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
1980 yz 80 won't stay running
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[QUOTE="76GMC1500, post: 1202111, member: 73139"] If the black choke knob is adjustable, use that to bring it down (clockwise). Otherwise, there will be a screw near the center of the carb on the side (counter clockwise). That could be it. You might need to make some adjustments on the pilot screw to restore the throttle response, near the seperation of the float bowl/carb main body on the airbox side. 1 1/2 turns is a good start, if you can't get it right with plus or minus a turn, you'll have to change the pilot jet. For the pilot screw, counterclockwise is leaner, clockwise is richer. I don't know exactly what carb is on the bike, so things may be different, but this covers most carbs on 2-strokes. If nothing you do controls the idle or the bike is slow to return to idle after a rev, the pilot jet may be too lean or there is an air leak. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
1980 yz 80 won't stay running
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