1991-1993 Yamaha Exciter II-570 Service Manual, Page 264Get this manual

1991-1993 Yamaha Exciter II-570 Service Manual, Page 264

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CARBURETOR TUNING 2E321

Throttle stop screw Damaged pilot screw Clogged bypass hole

Adjust Replace pilot screw Clean

Clogged or loose pilot Clean and retighten j