MAXIMIZE THE POWER WITH GOOD JETTING. THE AIR/FUEL MIXTURES NEAR 10:1 ARE RICH, AND THE AIR/FUEL MIXTURES ABOVE 14:1 ARE LEAN. THE BEST POWER OF THOSE SHOWN IS NEAR 13:1 AIR/FUEL MIXTURE.
ALMOST ALL OF THESE RUNS WERE MADE WITH A BONE-STOCK RUCKUS (#75 MAIN JET) AND EITHER STOCK INTAKE, OR RESTRICTING THE AIR-FLOW ENTERING THE AIR BOX. THERE IS ONE VERY LEAN RUN THAT MADE THE LOWEST POWER (1.64HP) BY ADDING AN EXTRA AIR HOLE TO THE AIR BOX AND LEAVING THE MAIN JET STOCK.