Thanks for the advice CJ, BB and Gadge.

I will note your advice for when I dismantle the block. For now the carby and fuel tank are clean and I have installed some new gaskets. Things are running quite smoothly now except for one issue... I managed to break the throttle linkage and now I�m having issues with speed control. I have remade the linkage for now with some rigid throttle cable but it is far from ideal (pics to come). I�m looking at a new linkage and spring now to get things working properly.

Other than that I�m quite happy with the way the engine is running and I�m looking at the next steps. I want to avoid working on the head and block for now, what should my next steps be?

Regards,

Tony