Gauge is a brand new one.
Fanbelt tension is a good point, it does squeal a bit on start up, so I’ll check that tomorrow.
The other thing is the carby has started to not return to idle again. I had added an assist spring to help with this (pictures further back in this thread), but it looks like my Chinese carby might need opening up for a look. Something must be binding in there.
thanks John.

