Question about Yamaha XS2 Motorcycles

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1989 Zuma, just rebuilt carb to OEM specs, turned air screw to factory setting, Removed gas cap in case not allowing air. Installed new spark plug. Scooter will fire and run for about 20 seconds then dies. Removed plug and found oil/gas mix on plug. wiped off and re-installed. Turned air screw from position half turn each direction and retried firing. Nothing. Original complaint with scooter was that it would loose power under acceleration i.e. going up hill.

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Posted on Jul 01, 2009


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Need to know how to adjust a carb on the 2.5L. I'm having a problem with too much gas getting into the chambers and drenching my spark plugs. I can also smell a lot of gas coming out of the exhaust. I...

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1989 Zuma, just rebuilt carb to OEM specs, turned air screw to factory setting, Removed gas cap in case not allowing air. Installed new spark plug. Scooter will fire and run for about 20 seconds then dies....

Half a turn is too much - 1/8th at a time.
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