Engine shuddering at low speeds - SV650.org

28-05-12, 08:49 PM

Ok I'm new to riding having only got my licence in March. I bought my SV off a workmate, 1999 year but less than 10k on the clock, recently MOT'd but last serviced about 4000 miles ago.

So, I've been having great fun getting some practice and love the high speed stuff. However, I commuted into central London for the first time today and whenever I was going at less than approx 30mph, the bike started juddering, almost jumping along. The only thing I can liken it to is in a car when you're accidentally in 4th gear instead of 2nd - but I tried going up and down the gears but nothing seemed to help, so I'm pretty sure it's not that. It's absolutely fine at higher speeds. I've noticed it before at slow speeds but only when I've been near home so I haven't thought too much of it. What I don't want is for it to conk out on me when I've shoved myself at the front of a busy London queue of traffic!

What could be causing this??

DJ123 · 28-05-12, 08:53 PM

Hi Emma, welcome to the land!

Firstly, i'd say it would need a service 1st as the intervals are 4000 miles. It sounds possibly like a carb issue of sorts. I'm not too clued up on the carbs unfortunately. Hopefully one of the resident techies will be along shortly!

muzikill · 28-05-12, 08:53 PM

Carb balance might help for a start.

Bibio · 28-05-12, 08:57 PM

check the oil level. as said it's due another service.

29-05-12, 08:38 PM

It is definately due a service. You will be surprised what a difference a few glugs of oil make. It sounds like a rich mixture, which may present in a weak spark. How is it to start?

Does it feel like its on, off, on off etc?

H

yorkie_chris · 30-05-12, 07:52 AM

Check your chain, often a tight spot can feel like it's jumping.

28-05-12, 08:49 PM	#1
Emma_83 Guest Posts: n/a	Engine shuddering at low speeds Ok I'm new to riding having only got my licence in March. I bought my SV off a workmate, 1999 year but less than 10k on the clock, recently MOT'd but last serviced about 4000 miles ago. So, I've been having great fun getting some practice and love the high speed stuff. However, I commuted into central London for the first time today and whenever I was going at less than approx 30mph, the bike started juddering, almost jumping along. The only thing I can liken it to is in a car when you're accidentally in 4th gear instead of 2nd - but I tried going up and down the gears but nothing seemed to help, so I'm pretty sure it's not that. It's absolutely fine at higher speeds. I've noticed it before at slow speeds but only when I've been near home so I haven't thought too much of it. What I don't want is for it to conk out on me when I've shoved myself at the front of a busy London queue of traffic! What could be causing this??

28-05-12, 08:53 PM	#2
DJ123 Member Mega Poster Join Date: Jul 2011 Location: Somewhere over there Posts: 3,245	Re: Engine shuddering at low speeds Hi Emma, welcome to the land! Firstly, i'd say it would need a service 1st as the intervals are 4000 miles. It sounds possibly like a carb issue of sorts. I'm not too clued up on the carbs unfortunately. Hopefully one of the resident techies will be along shortly! __________________ BMW F800ST

28-05-12, 08:53 PM	#3
muzikill Member Mega Poster Join Date: Jul 2005 Location: Dunfermline Posts: 1,712	Carb balance might help for a start. __________________ Learn to maintain your bike, take it apart, rebuild the engine & more (using better bolts ), drop it & fix it again! K3 Job c.v: Engine:remove/split/rebuild/refit. Replace:Gearbox,Fuel pump,Gaskets. Piston clean,rings. Overhaul:Throttle body,Injectors,Brakes,Forks. Remove/refit:Exhaust,Radiator,Oil cooler,Throttle,Air filter,Tank. Replace: Oil,Coolant,grease,brake hoses & bleed.

28-05-12, 08:57 PM	#4
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,568	Re: Engine shuddering at low speeds check the oil level. as said it's due another service.

29-05-12, 08:38 PM	#5
Heefy Guest Posts: n/a	Re: Engine shuddering at low speeds It is definately due a service. You will be surprised what a difference a few glugs of oil make. It sounds like a rich mixture, which may present in a weak spark. How is it to start? Does it feel like its on, off, on off etc? H

30-05-12, 07:52 AM	#6
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Engine shuddering at low speeds Check your chain, often a tight spot can feel like it's jumping. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

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