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I have a 2006 midnight roadstar silverado and I am having trouble with fuel dumping out of the carb when I start it. This doesn't happen all the time but usually it is hot and it sometime sounds like the fuel pump keeps running. I know this sounds crazy but it is true other times you don't hear the fuel pump and it just runs out. any suggestions?
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Carb cleaner fuel additive can be used but only after you have stopped the carb flooding. Gently tapping the carb might do the trick otherwise it will have to be a strip-down.
Carb cleaner is good for removing varnish and other fuel residue but it won't remove insoluble dirt or compensate for wear - carb flooding might be caused by a sticking float valve but most likely it is either wear or dirt.
not a throttle valve, but the float needle valve that shuts the fuel off with the float. the only cure for the sticking floay valve is to remove the carb and clean it.
The Yamaha Roadstar has a dry sump oil system. What this means is that the oil is stored in an oil tank to reduce the size of the engine. By storing the oil in the tank (which is under the seat and has the filler cap/dipstick, the engine does not need a sump under the crankshaft to store the oil. In this type of system the oil is pumped back to the tank after making its rounds through the engine. When you shut the bike off the oil will settle in the engine until you run the engine. The procedure to check the oil is to warm up the engine and allow it to idle for approximately 3 minutes. Do not rev up the motor during this time as it will cause the oil level to not read correctly. After shutting off the motor, check the oil level and adjust it to keep it in the proper level on the dipstick.
I had this same problem. What I discovered was the float needs adjusted on the carb. I set mine lower inthe bowl and it stopped the leaking. Reason for this happening is on hot days the fuel in the bowl will boil. This boiling action dumps in more fuel and the carb spits it out the air breather.
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