Your carb should not be getting that hot, I think you said in an earlier post you had a heat insulating gasket fitted?Well doing lots of riding today...highway stuff out to meet up with Worntorn. Today, seems my hot starts are pretty good...a few kicks at most. I did note a few times the failed kicks seemed too easy at turn over...flooding might be true.
This is all since some idle mix adjustments made later yesterday. Also tightening up of header rosettes. But after a 20 mile ride, we stopped to chat. I noted my carb was cool to touch. After 20+ min of jaw waging, carb was too hot to touch...just happened to twiddle full throttle and stunned to have it jam wide open. A very light tap top of carb and it snapped down.
Repeated this several times. Opened taps to let fuel in, cool it down solved the jams. Not sure if this at all related to hit starting issues.. but got me a bit freaked out now.
When running the carb is cooled by the huge flow of air through it. When you idle or ride slowly in town then stop it is inches from an extremely hot air cooled engine and heats up, as does your air filter front plate, legs etc. Stop the airflow over the head and heat rises instantly. To 375F or more.
Its how others mount them. Its unlikely its a problem.
Absolutely but I wanted to keep the post bite sized on quite why the carb can get very hot without anything being 'wrong' .The oil testing read was good. Thx.
While airflow must have cooling effect on the carb...I'm very sure having fuel evaporating inside the bowl has a more significant cooling effect. When I found the throttle getting stuck at wide open with the hot to touch carb, I opened the fuel taps, and within only 5 or 10 seconds, the throttle slide was no longer sticking at wide open and the carb body was no longer too hot to touch comfortably....and actually at/below ambient within a minute. Evaporation, liquid to gas transition, takes heat energy...which is being absorbed from the metal of the carb body. Works in an Air Conditioner exactly the same way.