First off .........Dont dump the pumper carb.....Its easier to tune the engine with a pumper carb over a floater carb.....
Piston ported engines need a custommade reedbox and internal piston porting/windowing to be able to use reeds seeings the engine is reedless..
With the pipe youll only pick up limited performance....The porting of the piston,,lightening of the piston,,porting of the cylinder ports aswell as port timing it with a degree wheel and raising the compression will make the best power.........
A real walbro WT813 carb would be the best carb upgrade...There are no jets in a walbro,,,just adjustment needles,,factory settings are 1 1/4 turns each needle and the airgap disk setting on the idle screw is around 1mm then adjust the tune to dial the engine-in from there..........
hp velocity stack with hp airfilter is needed
NGK BPMR7A sparkplug upgrade gapped to .030"....
Good Luck
Piston ported engines need a custommade reedbox and internal piston porting/windowing to be able to use reeds seeings the engine is reedless..
With the pipe youll only pick up limited performance....The porting of the piston,,lightening of the piston,,porting of the cylinder ports aswell as port timing it with a degree wheel and raising the compression will make the best power.........
A real walbro WT813 carb would be the best carb upgrade...There are no jets in a walbro,,,just adjustment needles,,factory settings are 1 1/4 turns each needle and the airgap disk setting on the idle screw is around 1mm then adjust the tune to dial the engine-in from there..........
hp velocity stack with hp airfilter is needed
NGK BPMR7A sparkplug upgrade gapped to .030"....
Good Luck
