Fuel in the crankcase? (Not \'Busa)

[OB_Gary]

Had someone contact me with a 92 GSX-R750 model that has been sitting garaged for a few years. Owner was polishing the fame, etc after a lowside and replaced the body panels and it's now in mint condition. Bike runs like a top, but when the oil was drained last night, it had a lot of gasoline in it. The bike hasn't been smoking, and this was fresh oil put in just a few days ago. Anyone have a clue how the fuel is getting in?

Any insight is welcome.

 

[OB_THE MOTORHEAD]

your floats in the carbs have crap between them and thier seats.this allows the fuel to reach a level thats too high.this extra fuel overflows into the airbox and sometumes the cyl.then into the crankcase.you need a carb clean.be sure not to leave the bike on prime when storing or you'll end up with the same type of problem with fuel in the oil.

 

[DaveO]

Motor is correct. Do not leave the petcock in the prime position for extended time periods. Also check to make sure the petcock is NOT flowing in the on/res positions when the engine is NOT running. It is a vacuum petcock which pumps fuel in on/res only when the engine is running. Prime is intended for when you run out of fuel and need to "prime" the system.

Anyone with a modified "R", or running juice will benefit greatly by switching to a Pingel petcock.

Dave