Gk73a weird Carb problems

[bikermike]

I've been having problems with my bike,

When it's hot it dies, and to start it I have to hold the throttle fully open. It will then only tick over if I hold the throttle fully open.

So far I have done:
Plugs
Coils
Ht leads
Carb orings (previous owner)
Cleaned carbs out, removing each jet and blasting with carb cleaner and an air line.
Float heights set to 14.6mm
New air filter
Checked carb boots for leaks and they are all good.

Anyone got any ideas? Bike is standard apart from 4-1 yoshi pipe. About to sell this thing soon, nearing the end of my tether!!!

[mike151]

Have you cleaned the main tubes properly, they,re a press fit into the carb body & live under the main jets