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1986 Yamaha Moto 4 YFM228 bogs down under load


chuckcnm
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Dream Car Giveaway

Exhaust can be clogged too. Did you mess with the needle's clip setting on the carb slide? Does turning the choke on while riding change anything? See if running it with the aircleaner lid removed changes anything - could be restriction in the intake tract ducts (mouse nest) going to the airbox.

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I have ordered a rebuild kit will wait till I get before I open it up. Only setting I have mess with is the idle screw. I have been thinking about the choke, will try that tonight. I did pull the air filter off and I am still getting black exhaust and I put in a new spark plug.

Thanks ALL will let you know what I find.

 

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