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Charlie Foxtrot · 05-17-2009, 04:07 AM

I'm experiencing a similar problem minus the back fire with my 99' GZ250. My bike has also been sitting for about two years. I run 87 it in and it sat with about a quarter of a tank. I dumped in a bottle of gas treatment and filled the tank the rest of the way with 89 hopping that this would clear out any gunk that may be in the carb as a result of sitting for so long. The engine will run roughly with the choke fully on but when I push it back it cuts off between half and a quarter choke. I pulled the spark plug and it wasn't fouled. I checked to make sure it was sparking and it was. The only thing I can think it would be is the idle set screw is not set right or that the fuel line may be partly blocked and its just not getting enough fuel when the choke is off.

Any suggestions would be greatly appreciated.

05-17-2009, 04:07 AM	#8
Charlie Foxtrot Junior Member Join Date: May 2009 Location: North Carolina Posts: 13	Re: starting and backfire problems I'm experiencing a similar problem minus the back fire with my 99' GZ250. My bike has also been sitting for about two years. I run 87 it in and it sat with about a quarter of a tank. I dumped in a bottle of gas treatment and filled the tank the rest of the way with 89 hopping that this would clear out any gunk that may be in the carb as a result of sitting for so long. The engine will run roughly with the choke fully on but when I push it back it cuts off between half and a quarter choke. I pulled the spark plug and it wasn't fouled. I checked to make sure it was sparking and it was. The only thing I can think it would be is the idle set screw is not set right or that the fuel line may be partly blocked and its just not getting enough fuel when the choke is off. Any suggestions would be greatly appreciated.
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