Ok the results of my experiment.

I reported a 20x8 prop before and it is only a 20x6.
I was getting some lighting interference before also.

Offical numbers

Running methanol mixed 50 to 1 with permanent on board glow.
20x6 WOOD mater airscrew
7250 rpms good idle.
Running rich with the stock muffler.
Should I be getting a little more RPMS than that with a 45cc homey?
Running a walbro 499 carb.

What is best muffler to buy and from where?

Pictures