high rev...I am totally lost

[bubba75]

I recently had my banshee in the shop because when it gets warm it wants to throttle up and stick and will not come down unless you shut it off. After a 140.00 and the carbs gone through, new needle valves, and a leak check, I still have nothing. They did the leak test and the outer crank seals and boots were good. in there conclusion to the problem they said that the "inner seal" is bad. They did some check by putting a piece of paper over a spark plug hole and did a pressure test and it failed. As far as to my knowledge there is no such thing as a inner crank seal on a banshee. If someone can enlighten me on this situation or educate me so I don't have to put 1800 in a rebuild, I would appreciate it. Please help me out.

 

thanks

[klotzburner]

Could you give a little more info on what happens when it acts up? Does it do it all the time after its warm? How high does it rev? what are you running for carbs?

[LS1Inferno]

I recently had my banshee in the shop because when it gets warm it wants to throttle up and stick and will not come down unless you shut it off. After a 140.00 and the carbs gone through, new needle valves, and a leak check, I still have nothing. They did the leak test and the outer crank seals and boots were good. in there conclusion to the problem they said that the "inner seal" is bad. They did some check by putting a piece of paper over a spark plug hole and did a pressure test and it failed. As far as to my knowledge there is no such thing as a inner crank seal on a banshee. If someone can enlighten me on this situation or educate me so I don't have to put 1800 in a rebuild, I would appreciate it. Please help me out.

 

thanks

 

yes there is it a seal on the crank to seal each cylinder from each other. but it could be as simple as cracked carb boots when its running spray carb cleaner around different places to see if it revs up. and if not get someone who know what they are doing to do a leak down test on it.

[dragbanshee]

dejavu, sure seems like I have been here before, no couldn't have.