gutless - SV650.org

Wideboy · 06-01-08, 12:26 PM

as title says really.

took the bike out this morning and it was absolutely gutless

, i have no idea whats wrong with it. Pulling away is pants and the usual little flat-spot it gets in 1st has gone because it usually kicks in about mid range then i get good power afterwards, but now i don't.

i then thought it was because it needed a service BUT its not due for a service for another 100 miles so its not as though I've been neglecting it.

I last took it out on Monday and it was running perfect, roads weren't wet, all i did was put it in the garage and cover it over and it was bone dry.

im a bit of a numpty when it comes to twins as i've only had experience with singles and mopeds

im going to shoot off in min to get the stuff to give it a service.

06-01-08, 12:57 PM

How does it sound?

mattSV · 06-01-08, 12:59 PM

Did I pass you going through Botley?

Ah, just seen your PM

06-01-08, 01:00 PM

See if anything is blocking the air intake or even for a rodent's nest starting to accumulate inside the airbox.
It's possible.

I've read that 1st generation SV-650s use a stick-on sound dampener that's on the underside of the fuel tank, and if this falls away from the tank, it blocks the air intake directly below.

Wideboy · 06-01-08, 02:04 PM

Quote:

Originally Posted by sinbad

How does it sound?

sounds normal thats why i was puzzled

Quote:

Originally Posted by YZEtc

See if anything is blocking the air intake or even for a rodent's nest starting to accumulate inside the airbox.
It's possible.

I've read that 1st generation SV-650s use a stick-on sound dampener that's on the underside of the fuel tank, and if this falls away from the tank, it blocks the air intake directly below.

thats what i was thinking. im about to delve into the bike and give it a bluddy good service

Quote:

Originally Posted by mattSV

Did I pass you going through Botley?

Ah, just seen your PM

yes was me, i was in a hurry to get home

Biker Biggles · 06-01-08, 02:14 PM

Sticking chokes/plungers?Always a favourite on the curvy.

yorkie_chris · 06-01-08, 04:05 PM

Possible sticky choke as mentioned, worth taking them out and cleaning and greasing them and the cables. But it's worth doing that often anyway. As well as removing the foam under the tank, because it does nothing and you might as well.

If that and the air filter are OK then I'd possibly check the carb diaphragms

06-01-08, 05:11 PM

hi

I'm experiancng simialr probs

[derail]

If i cover the rear carb air intake the bike stalls , if I cover the front carb air intake the bike stills runs , am I right in thinking that the front carb hasn't got an airtight seal and is drawing air in elsewhere .

Sorry

[/derail]

Hopefully Soon

yorkie_chris · 06-01-08, 05:13 PM

Are they balanced?

If you've got the balancing screw wound way too far out and the idle adjuster unscrewed a fair way then that would allow it to do that, and also be really lumpy and horrible. If that all checks out then have a look for an air leak, if its not something stupid like the carb clip rusted in half then its possible the rubber boot has a hole in it, hairspray works to temporarily seal leaks like that, but it would have to be a big leak if putting your hand flat over the carb mouth doesn't stall it. You're not a million miles from me, give us a shout if you want me to take a look.

06-01-08, 05:17 PM

If that was at me chris no idea , not got a carb balancer .

I noticed that the front slider wasnt fluttering as the back one was , and have hesitancy under acceleration and crap starting .

06-01-08, 12:26 PM	#1
Wideboy Evel Knievel Mega Poster Join Date: Jun 2007 Location: Eastleigh Posts: 4,641	gutless as title says really. took the bike out this morning and it was absolutely gutless , i have no idea whats wrong with it. Pulling away is pants and the usual little flat-spot it gets in 1st has gone because it usually kicks in about mid range then i get good power afterwards, but now i don't. i then thought it was because it needed a service BUT its not due for a service for another 100 miles so its not as though I've been neglecting it. I last took it out on Monday and it was running perfect, roads weren't wet, all i did was put it in the garage and cover it over and it was bone dry. im a bit of a numpty when it comes to twins as i've only had experience with singles and mopeds im going to shoot off in min to get the stuff to give it a service. __________________ 05 DRZ400E RIP hovis Last edited by Wideboy; 06-01-08 at 12:29 PM.

06-01-08, 12:57 PM	#2
sinbad Guest Posts: n/a	Re: gutless How does it sound?

06-01-08, 12:59 PM	#3
mattSV Member Mega Poster Join Date: Jul 2003 Location: Darn sarf, innit Posts: 2,025	Re: gutless Did I pass you going through Botley? Ah, just seen your PM __________________ 2000 - 2004 SV650S 2004 - 2009 SV1000S 2009 - 2013 Triumph Sprint ST1050 2013 - 2016 Triumph Explorer 1200 2016 - Ducati Multistrada DVT S Last edited by mattSV; 06-01-08 at 01:02 PM.

06-01-08, 01:00 PM	#4
YZEtc Guest Posts: n/a	Re: gutless See if anything is blocking the air intake or even for a rodent's nest starting to accumulate inside the airbox. It's possible. I've read that 1st generation SV-650s use a stick-on sound dampener that's on the underside of the fuel tank, and if this falls away from the tank, it blocks the air intake directly below.

06-01-08, 02:14 PM	#6
Biker Biggles Member Mega Poster Join Date: Jan 2005 Location: Barnet Herts Posts: 5,071	Re: gutless Sticking chokes/plungers?Always a favourite on the curvy. __________________ On a clear day we stand there and look further than the ordinary eye can see.

06-01-08, 04:05 PM	#7
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: gutless Possible sticky choke as mentioned, worth taking them out and cleaning and greasing them and the cables. But it's worth doing that often anyway. As well as removing the foam under the tank, because it does nothing and you might as well. If that and the air filter are OK then I'd possibly check the carb diaphragms __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

06-01-08, 05:11 PM	#8
HopefullySoon Guest Posts: n/a	Re: gutless hi I'm experiancng simialr probs [derail] If i cover the rear carb air intake the bike stalls , if I cover the front carb air intake the bike stills runs , am I right in thinking that the front carb hasn't got an airtight seal and is drawing air in elsewhere . Sorry [/derail] Hopefully Soon Last edited by HopefullySoon; 06-01-08 at 05:12 PM. Reason: Cos I can't spell my own nick

06-01-08, 05:13 PM	#9
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: gutless Are they balanced? If you've got the balancing screw wound way too far out and the idle adjuster unscrewed a fair way then that would allow it to do that, and also be really lumpy and horrible. If that all checks out then have a look for an air leak, if its not something stupid like the carb clip rusted in half then its possible the rubber boot has a hole in it, hairspray works to temporarily seal leaks like that, but it would have to be a big leak if putting your hand flat over the carb mouth doesn't stall it. You're not a million miles from me, give us a shout if you want me to take a look. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat Last edited by yorkie_chris; 06-01-08 at 05:15 PM.

06-01-08, 05:17 PM	#10
HopefullySoon Guest Posts: n/a	Re: gutless If that was at me chris no idea , not got a carb balancer . I noticed that the front slider wasnt fluttering as the back one was , and have hesitancy under acceleration and crap starting .

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