Sputter at high RPMs - SV650.org

12-07-08, 10:46 PM

My bike is sputtering at higher RPMs (7,000 or so). I stored my bike with the gas tank full over the winter (a long one, Nov - May) and I think I gummed up the carburetor. So I took the air box off and sprayed the carburetor directly with carburetor cleaner. After the engine went back to idling normally (it bogged down from the carburetor cleaner) I throttled it back up and it was still sputtering at the same spot. Gummed fuel lines maybe? I'm curious what you all think. Any help is much appreciated.

~Josh

yorkie_chris · 13-07-08, 09:40 AM

Carp in main jet or a sticky needle

13-07-08, 07:05 PM

Thank you for the help. Do you think running a tank of carburetor cleaner through the system will give it a good chance of cleaning up the gunk/unsticking the jet?

Biker Biggles · 13-07-08, 09:28 PM

Assume its a carb model?
Have you checked the choke plungers and cables?They stick and can cause rough running.

yorkie_chris · 13-07-08, 10:45 PM

That seems to affect low rather than high rpm, but it's worth a go.

Carb cleaner additives and so on I've not got any experience of. Worth a go perhaps.

12-07-08, 10:46 PM	#1
RideSV Guest Posts: n/a	Sputter at high RPMs My bike is sputtering at higher RPMs (7,000 or so). I stored my bike with the gas tank full over the winter (a long one, Nov - May) and I think I gummed up the carburetor. So I took the air box off and sprayed the carburetor directly with carburetor cleaner. After the engine went back to idling normally (it bogged down from the carburetor cleaner) I throttled it back up and it was still sputtering at the same spot. Gummed fuel lines maybe? I'm curious what you all think. Any help is much appreciated. ~Josh

13-07-08, 09:40 AM	#2
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Sputter at high RPMs Carp in main jet or a sticky needle __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

13-07-08, 07:05 PM	#3
RideSV Guest Posts: n/a	Re: Sputter at high RPMs Thank you for the help. Do you think running a tank of carburetor cleaner through the system will give it a good chance of cleaning up the gunk/unsticking the jet?

13-07-08, 09:28 PM	#4
Biker Biggles Member Mega Poster Join Date: Jan 2005 Location: Barnet Herts Posts: 5,068	Re: Sputter at high RPMs Assume its a carb model? Have you checked the choke plungers and cables?They stick and can cause rough running. __________________ On a clear day we stand there and look further than the ordinary eye can see.

13-07-08, 10:45 PM	#5
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Sputter at high RPMs That seems to affect low rather than high rpm, but it's worth a go. Carb cleaner additives and so on I've not got any experience of. Worth a go perhaps. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

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