Question about 1994 kawasaki VN 750 Vulcan

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Carburator problem I've had my bike (used) for 4 months. I've put 200 miles on it and it ran fine. Two weekends ago it starting sputtering (after I'm in 4th or 5th gear) and acting like it's running out of gas. I have gas, and the bike is strong going thru the gears, then just quits. If I clutch it, the gas picks back up and it'll run, but still sputtering and losing pull. I've checked and cleaned the fuel lines and the on/off/reserve fuel selector. Could I have gotten some trash in the tank that worked its way into on of the carbs? What do I need to do or look for now?

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Hi and welcome to FixYa,

Offhand would suggest a rebuilt/clean of the carbs. A temporary workaround would be to switch off the fuel petcock, remove the fuel hose, partially drain the carbs and spray into the fuel hose (going into the carbs) injector/carb cleaner. Reinstall fuel hose, turn on fuel. Remove the air filter and start the bike. After warmup, rev while spraying injector/carb cleaner into the opening where the air filter should be. Get a hard paper/board (such as a folder) cut to a size bigger than the air filter but would fit inside the opening of the airbox. Rev/pump the bike slowly building the RPM at about 4~5K suddenly cover the opening (with the board) to fully choke the carbs while maintaining throttle. Before the engine dies, remove the cover. Spray again while revving. Repeat choking/spraying several times. The idea is for the vaccum to draw the clog/blockages.

Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 19, 2009

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