Fredrik,
I ran Sup .90 inverted, Saito 100 inverted, ST .60 inverted, bunch of little motors .15, 25, .32 inverted.
all you need to do is

1. Watch your tank and fuel lines. not too far from motor and not too high on the carb.
2. I use a Dubro filler with a two line tank. Lines come out of the tank go down to the filler
come back up to the carb all in less that 7-10 inches of fuel tube.
3. Run muffler pressure.
4. Run a new plug, dont be cheap on plugs it's not worth it for the motor to die on final when the motor is
pulled back to idle.
5. Sometimes you will get siphone affect on the carb. do one of two things
A. Immediately upon shut down defuel the tank
B. If you dont want to do that use a hemostat to shut off the fuel.
C. Close the needle valve and reset and tune everytime you run up.

Thats all I can think of.

JDS