I'm thinking about grinding the top of the exhaust port about 2mm to raise the timing and open up the throttle barrel till it matches the aluminum carb bodies intake. The pipe was pulling in air / fuel fast overwhelming the tank draw so will have to tap the pipe and add a pressure nipple too. The rod has no bushings so light weight props should help keep things together for a reliable sport / race engine.
Last edited by Pond Skipper; 01-14-2016 at 09:13 PM.