Question about 1989 Yamaha TZR 250

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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. ATTENTION HAVE TO SELECT WRONG TYPE OF MOTORCYCLE TO GET TO POST. PLEASE NOTE THIS IS FOR A 1989 YAMAHA ZUMA RAZZ 50CC SCOOTER.

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Posted on Jul 01, 2009

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Well if it takes mixed gas then its ur carb u might want to try cleaning it real good blow it out make sure nothing is stopped up or it can be getting to much gas and floodong out but if it dont take mixed gas then u have a blown head gasket causing the oil to mix with the gas not allowing it to spark good enuff

Posted on Apr 28, 2012

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Fuel line vacume opperated pull off lines,inside fuel tank tap is like a ball valve stoke n poke till moving freely should work done it but done it since dirty tank.

Posted on Apr 23, 2010

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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....

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