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Hi all,

I have a 2001 Suzuki Quadmaster ltf500 4x4.

It starts and idles great but when I give it more than quarter it half throttle it splutters and begins to die and sometimes backfires.

I have cleaned the carb with no change. I also checked the vacuum seal and it has no rips looks good.

I have checked valves and they are all in tollarance.

I have pulled the spark plug and it is dry and sooty unsure what that means.

Please help I can't think of anything. Thanks all.

Chris
 

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1998 Quadrunner 500, 2003 Vinson 500, 2007 King Quad 450, 2012 King Quad 750, 2009 Grizzly 700
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I have a 1998 Quadrunner 500 and it had the same problem and I discovered that there were holes in diaphragm in the carburetor. I rebuilt the carburetor and it runs like normal again.
 
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