Herald Classic 125cc Stalling

[Bludoggo]

Hi everyone!

 

So i've had this bike for a while and everything has been fine with it, I use it for commuting mostly and the odd countryside ride at the weekend. The other day while driving to work it kept stalling at red lights (not my fault, finally! haha). The RPM stays around 1500 until we stop at the light, then it very slowly dwindles down to 1300/1000 ish, sort of splutters and then cuts out. Going to work this morning, was fine for half the journey, back in the city, red light.. does the same thing. When I got to work this morning, thought I would check it out, popped it in neutral just to see what would happen.. does the same thing. Always restarts. 

 

So yeah, any advice would be good. I am led to believe that it won't be the rpm setting because 1500 is normal ish? But I am a novice. 

 

Ta

 

 

[Mr Fro]

My money is on running lean.

 

Check out the rubbery bits around the carb/injector. 

[Mississippi Bullfrog]

Is the problem linked to engine temperature? You say on the way home it developed later in the ride and once you hit city traffic.

 

Alternatively an engine that won't idle when hot may be running too rich. How long is your commute? Because if it develops after a few miles and more in city traffic then the engine will be running hotter by then. 

 

First things to check are the plug, air filter and as above check for a leak on the intake and the exhaust. 

[MikeHorton]

May be a common issue. There are quite a few herald, mutt and sinnis forums which may be able to help. All those bikes run off the same Suzuki gn/gs type engines