Question about 2001 Suzuki DR 200 SE

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Fuil in air box getting in oil dr200se year 2005 have carb soaking now olny 500 miles cant be worn may be the dry rot o ring in pet **** so far all the diaframs good in pet **** and diafram in top of carb also good when i took gas tank off noticed fuel dripping when in the on postion did not test res side let me no your thoughts got taken on this deal

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What you are dealing with is a vacuum petcock with a bad vacuum diaphragm , in this case fuel is bypassing the petcock via the vacuum line and filling the engine (oil) with gasoline.
If you have a standard petcock that is leaking (not shutting off properly) or just left in the on position a stuck float needle will also fill your engine (oil) with gasoline. This can happen with a clean carburetor and a good float needle. It just sticks and you have to change your oil. If you have the kind of fuel petcock that allows you to turn it off when not in use , always turn off your gas when not riding.
You will have to change your oil if it is fouled with gasoline. I suspect a vacuum operated petcock is at fault. With standard petcocks I have seen new motorcycles in perfect order stick a float needle ( Kei Hin Carburetors ) and fill there engines and air boxes with gas/oil mix. On vacuum petcocks the diaphragm that shuts off the fuel flow is usually leaking and at fault.

Posted on Jan 01, 2011

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My Suzuki DR200DE 1997 has no OFF, but a PRI position.
Always leave it on ON. (or RES)
PRI is only to flood or flush the carburetor float box (with the little screw underneath open) after month long standing.
If left on PRI you will flood the gearbox with gaz. Oilchange!

Posted on Jul 27, 2013


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