Question about 2000 Yamaha YZF-R1

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Snowmobile problem Hello, My name is Jay and I have a 2003 Yamaha sx 700 viper that starts and fires well but wont stay running unless i keep choking it half way.I've changed my plugs drained and refilled my fuel tank with high test. but still have the same problem.Can tou help me out with ant suggestions? P.S.Thanks for youre time.

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Hi jay,,if u r having to use the choke to keep it go ideling , then either u the idel jet is blocked and will give u fuel starvation ,so usin the choke the main jet has to force fuel in 2 the float chambers,, at the bottom of the carb,, so firstly remove bottoms of carbs and one jet at time take the needle jet and main out , u will see little holes on the needle jet.or needle guide jet if u like, poke a pin in the holes ,and blow threw till u see light threw them, give every thing in the bottom carb a clean while u r there, then replace that jet and everything else ,,then move to the next carb and repeat the process,,put carbs back on the bike, then air boxmake sure theres no air leaks between air box and carbs ,, try that matey,, hope it helped,,

Posted on Jan 10, 2009

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a

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