Can't maintain idle, engine just dies
Posted: Thu Jul 21, 2022 4:48 pm
Hi all, long time since I've posted for various reasons, but I'm back with a query regarding slow running. Just returned to Pompey from 'Operation-2-stroke', a five day tour of D-Day beaches with eight other riders of vintage Italian shopping bikes.
My GP125 (Allstyles 186 kitted) ran beautifully on the road but has never really been able to maintain a tickover despite a two hour dyno session with JG Scooters at the IOW last August. To be fair to them it was literally dark when they finished and they simply ran out of time. The slow running screw is turned up to the max but it isn't quite enough.
So, is it a case of fitting a larger pilot jet? It's a PHBL25 carb. There are no leaks and the ignition timing is set at a very conservative 16 degrees. Exhaust is via BGM big bore V2.
My GP125 (Allstyles 186 kitted) ran beautifully on the road but has never really been able to maintain a tickover despite a two hour dyno session with JG Scooters at the IOW last August. To be fair to them it was literally dark when they finished and they simply ran out of time. The slow running screw is turned up to the max but it isn't quite enough.
So, is it a case of fitting a larger pilot jet? It's a PHBL25 carb. There are no leaks and the ignition timing is set at a very conservative 16 degrees. Exhaust is via BGM big bore V2.