ORIGINAL: coralcape
Perhaps your rich condition is caused by the walbro carb. I have a corsair with a homey 45cc conversion, that does the same thing (goes rich in the air). I've just finished tapping the plate over the metering side of carb and plumbing a line to dead air. Will find out Mon. if it works. Good luck, red
This is a standard fix for going rich in the air.
It really helps with transition also.
The new tube from the metering plate goes inside the Fuse.
Good Luck