Gt500 lurchingwhen slowing down

[Vince]

My Gt 500 generally runs smooth at constant speed, accelerates well and ticks over ok but when I am slowing down for a junction say and shut off the throttle, it lurches on and off making it 'kangaroo'. I have to pull the clutch in to stop it.
Both carbs are balanced with slides going up and down in sinc and without the engine running they return to closed instantly.
Bike is standard with air box, new filter, standard jets. Inlet rubbers are all good.
Any ideas please as it makes riding slowly near impossible.

[Alan H]

Chain worn/slack or maybe rear wheel hub rubbers worn?

[Vince]

Just checked it and yes, they are worn and there is play but I wouldn't have thought enough to cause the lurching. Actually, it's the lurching that's probably making the Cush drive rubbers worse.
Definitely worth me getting them changed though, thanks for the tip.

[titan performance]

Hi Vince....it's a common-ish problem, which you will probably reduce by increasing the pilot jet to 32.5.

[Vince]

Hi Vince....it's a common-ish problem, which you will probably reduce by increasing the pilot jet to 32.5.

Thanks for the advice. Are they available and if so where's the best place to get them? Robinsons, crooks?

[tricky1962]

You could just try screwing the pilot screws a quarter of a turn or so first to richen the mixture
This works on my T500

[Vince]

You could just try screwing the pilot screws a quarter of a turn or so first to richen the mixture
This works on my T500

[Vince]

Quick update, fitted 32.5mm pilot jets and it's cured the problem. Can't tell you how much grief this problem has given me so I am chuffed as hell to have sorted it.
Many thanks to 'Titan performance' for the tip.

[titan performance]

Glad to help......