poor running at low speed - SV650.org

01-06-06, 09:36 PM

Hi all, hope you can help.

My bikes running very poor at low revs. It's fine when im on the motorway giving it some but when i drop to around 40mph it runs really bad, actually, more like when the revs drop below 4-5000rpm.

When idling the needle is bouncing between 1300 rpm and 2000rpm and is never constant.

Ive lifted the tank, there's no wires or fuel pipes squashed or chaffed, all the plugs seem to be plugged in, the spark plugs tight (& only 1200 miles old), HT leads attatched ok. Air filter and housing nice and clean. Throttle cable seems to be greased and smooth, as is the choke cable. Oil level is fine.

I did put some Redex in the fuel about three tanks ago and im wondering if this has cleaned out something and pushed it somewhere not good.... is this likely ??? Like i say, i put the Redex in i guess 400 miles ago and it's still running bad.

Cheers for any help in advance. Ash

Sid Squid · 01-06-06, 10:00 PM

Did this come on gradually or suddenly? As you've checked all else, I'd go for a blocked jet, or carb balance.

01-06-06, 10:02 PM

It came on suddenly, that's why i thought it could be the redex shifting something.

01-06-06, 09:36 PM	#1
ash Guest Posts: n/a	poor running at low speed Hi all, hope you can help. My bikes running very poor at low revs. It's fine when im on the motorway giving it some but when i drop to around 40mph it runs really bad, actually, more like when the revs drop below 4-5000rpm. When idling the needle is bouncing between 1300 rpm and 2000rpm and is never constant. Ive lifted the tank, there's no wires or fuel pipes squashed or chaffed, all the plugs seem to be plugged in, the spark plugs tight (& only 1200 miles old), HT leads attatched ok. Air filter and housing nice and clean. Throttle cable seems to be greased and smooth, as is the choke cable. Oil level is fine. I did put some Redex in the fuel about three tanks ago and im wondering if this has cleaned out something and pushed it somewhere not good.... is this likely ??? Like i say, i put the Redex in i guess 400 miles ago and it's still running bad. Cheers for any help in advance. Ash

01-06-06, 10:00 PM	#2
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Did this come on gradually or suddenly? As you've checked all else, I'd go for a blocked jet, or carb balance. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

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01-06-06, 10:02 PM	#3
ash Guest Posts: n/a	It came on suddenly, that's why i thought it could be the redex shifting something.