Opening the induction port on the "closing side" a few degrees is the easiest way for sure fire H.P. gain if done carefully, then polish the crank ind. port (you can open the crank hole some but not to much. Flow the opening at the rear of the crank & if it doesn't have a scalop on the crank face add one. Start with a small scalop at the crank hole, flowing out of the port & curving in the opiset direction of crank rotation into a point. Start with a scalop about 1/4" long & 3/16" wide at the port to a curved point. It doesn't have to be a deep scalop at first about 1/16" at the widest part to just a smigum at the tail. Flow the edges. You can also scalop the counter weight (to the left of the crank pin looking from the rear & flow it the same way. So instead of the counter weights flat top hitting the mixture, it in affect scoops the mix into the crank case. Cranks that have this done are called "tubo cranks". Start small & do a little at a time. You'll see almost instant results in power from the start. Ok someone is going to say "hold on bro"!!! aren't you taking weight off the crank counter balance & upseting the engine balance??? Technicly yes, but most engines are only balanced to 30% anyway so unless ya want to get into balancing engines which includes weighing everything & doing the correct calculations what you remove is minimum so balance is no great concern. Now that you have you mix really flowing good, you'll want to look into those transfer & exh. ports---later for that. Try this first :mex:
