I had a cup of tea and did some more fiddling. Took a chisel to the ramp so that it slides better over the screw in the kill switch hole. Then cut 1/3 off the spring. A chisel works really well on that plastic and leaves a nice smooth surface, with no burrs.

Getting pretty good control now, but it's revving pretty high on the max throttle. Without stuffing foam into the air cleaner, any thoughts on how to get the revs down a bit? I don't want to melt the piston lol.

Last edited by oztayls; 23/06/20 03:16 PM.