1994-2001 Yamaha Venture/V-Max 500 Series Snowmobile Service Manual, Page 394Get this manual

1994-2001 Yamaha Venture/V-Max 500 Series Snowmobile Service Manual, Page 394

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CARBURETOR TUNING
Main jet selection chart Spark plug color Light tan or grayDry black or fluffy depositsWhite or light grayWhite or gray insulator with small black or gray brown spots and elect