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Wayne S.
Wayne S., Motorcycle Mechanic
Category: Motorcycle
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Experience:  Experienced and Licensed Motorcycle Mechanic - all sizes and brands welcome.
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Runs when choke is on runs rough if you try to drive that

Customer Question

Runs when choke is on runs rough if you try to drive that way. Stalls if you shut choke off. 1984 yamaha venture 1200cc street
Submitted: 2 years ago.
Category: Motorcycle
Expert:  Wayne S. replied 2 years ago.


Have you tried any fuel cleaner additive like "Seafoam"?
Expert:  Wayne S. replied 2 years ago.
Most likely suspects are the fuel filter and the fuel pump.
These are on the left side behind the engine on the frame.
The pump should have about 2 psi pressure.
If the pump and filter are okay check the fuel
valve or petcock on the tank to make sure
fuel flow is good to the fuel pump.
Carb jets can get plugged but would only
affect all carbs if the bike was parked for a
long time. Some fuel additive might help here.
Last resort is cleaning the carbs fully.
Let me know if you need more info, thanks.

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