Thank you Guys
the advise is appreciated, I will monitor the engine performance and heat and see if I need to make the change to the baffle solution, I understand that the carb will need fresh air.
I have designed the ducts to be as close as possible to the fins of the cylinder and should get cool air flow from all three air intakes. I will look at the heat shield between the carb and the muffler.
Thank you everyone I will have a closer look at other ideas for cooling.
Kind Regards
Maverickd