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Jeff Policky
Jeff Policky, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 2425
Experience:  Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP
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I have a 2005 gs500f suzuki the bike idles fine but when i

Customer Question

i have a 2005 gs500f suzuki the bike idles fine but when i rev it up fast it loses power. also if i rev it slow it will go up to like 5000rpm then boggs down i have changed the spark plugs fuel filter and cleaned the jets. not sure where to go from here
Submitted: 2 years ago.
Category: Motorcycle
Expert:  Wayne S. replied 2 years ago.
Hi,Is the bike flooding or does it feel like it is lacking fuel? Are the plugs black, oily, sooty or whitish colour after it boggs down?Is the battery good and air filter clean?Compression good, no air leaks aroundintake rubber?Does it help to choke off the air supplyor get worse then?thanksWS--
Customer: replied 2 years ago.
When I changed the plugs one was black the other was white air filter is clean. It feels like it is lacking fuel. I would think. I sprayed carb cleaner around the rubber while it was running with no sound change. One thing I don't know is the fuel filter fills up with gas but when it is running there don't look like any gas is in it. Is it supposed to stay full. As far as compression not sure.
Expert:  Wayne S. replied 2 years ago.
There should be an ample amount of fuel supplied
and the filter should run fairly full.
Might be a small bit of air in the fuel filter
but generally it should be full when running.
Do you have a fuel pump or gravity fuel feed?
Might check the vacuum fuel valve or petcock for
problems. It uses engine vacuum to open the valve
and allow fuel to flow to the carbs.