Running poorly and popping. - SV650.org

19-08-10, 10:25 PM

Hello all, first forum post please be kind

I have a '02 SV650 with ~7k miles that I bought new and is literally almost completely stock. Only changes have been tires, fluids and spark plugs. The bike sat in storage for a couple of years and its been rough getting it going since bringing it back out (bad gas in tank and carbs). I've had a mechanic doing all the work but still having some issues and looking for guidance.

Main issue is rough running at low rpms, lower than 2k usually - popping from exhaust, stalls when touching the throttle while idling for a bit. I also get some surging when running holding the throttle steady at higher rpms > 3k.

Anyone want to take a whack at what my issues might be?

Almost forgot that the low pressure fuel pump died and has been replaced and there is a new line from the tank to the pump with a filter in it as well.

Thanks,
Steve

19-08-10, 10:28 PM

As its only affecting low revs I'd look at the Pilot jets in the carbs which will be gummed up.

19-08-10, 10:32 PM

Thanks for the quick response. Supposedly the mechanic took the carbs apart and cleaned them up. The shop has had the bike three times now so I would hope that gummed up jets is not something they have overlooked.

While I'm not mechanically incapable, I've never done work on carbs. Any tips on how I can check to see if they are gummed up?

rictus01 · 19-08-10, 10:37 PM

On the presumption the air filter has been changed, check the rubbers for air leaks and balance the carbs, then let us know how it is.

Cheers Mark

andrewsmith · 19-08-10, 10:39 PM

i would put some reddex into the tank a few times as see what happens.

after that carb strip or a battery replacement.
Mine did cut outs at low revs and it turned out to be the battery

Nicky S · 20-08-10, 12:43 PM

i had this problem. make sure u dont have any airleaks. the choke is not on, you fuel dose not have water or dirt init. as andrewsmith said put some reddex init might just be a small bit of dirt

i wish you the best of luck as i could never get mine to work so had to get some new carbs

19-08-10, 10:25 PM	#1
sjoerger Guest Posts: n/a	Running poorly and popping. Hello all, first forum post please be kind I have a '02 SV650 with ~7k miles that I bought new and is literally almost completely stock. Only changes have been tires, fluids and spark plugs. The bike sat in storage for a couple of years and its been rough getting it going since bringing it back out (bad gas in tank and carbs). I've had a mechanic doing all the work but still having some issues and looking for guidance. Main issue is rough running at low rpms, lower than 2k usually - popping from exhaust, stalls when touching the throttle while idling for a bit. I also get some surging when running holding the throttle steady at higher rpms > 3k. Anyone want to take a whack at what my issues might be? Almost forgot that the low pressure fuel pump died and has been replaced and there is a new line from the tank to the pump with a filter in it as well. Thanks, Steve

19-08-10, 10:28 PM	#2
hardhat_harry Guest Posts: n/a	Re: Need some advice As its only affecting low revs I'd look at the Pilot jets in the carbs which will be gummed up.

19-08-10, 10:32 PM	#3
sjoerger Guest Posts: n/a	Re: Need some advice Thanks for the quick response. Supposedly the mechanic took the carbs apart and cleaned them up. The shop has had the bike three times now so I would hope that gummed up jets is not something they have overlooked. While I'm not mechanically incapable, I've never done work on carbs. Any tips on how I can check to see if they are gummed up?

19-08-10, 10:37 PM	#4
rictus01 Member Mega Poster Join Date: Jul 2003 Location: South London Posts: 9,799	Re: Need some advice On the presumption the air filter has been changed, check the rubbers for air leaks and balance the carbs, then let us know how it is. Cheers Mark __________________ Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming, 'Wow! What a Ride!

19-08-10, 10:39 PM	#5
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: Need some advice i would put some reddex into the tank a few times as see what happens. after that carb strip or a battery replacement. Mine did cut outs at low revs and it turned out to be the battery __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

20-08-10, 12:43 PM	#6
Nicky S Member Mega Poster Join Date: Jul 2008 Location: crowborough, East Sussex Posts: 1,061	Re: Running poorly and popping. i had this problem. make sure u dont have any airleaks. the choke is not on, you fuel dose not have water or dirt init. as andrewsmith said put some reddex init might just be a small bit of dirt i wish you the best of luck as i could never get mine to work so had to get some new carbs __________________ Curvy With Lots Of Bits ... But Still More To Come

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