Originally Posted by exavid
One change I'm planning on the four stroke is to build a better engine mount I plan on bolting two pieces of aluminum angle (can't weld it the frame is aluminum) side by side with the flanges outward to the bike frame. A couple of holes in the sides of the frame at that point won't affect the strength much since lateral holes in that area are really in a neutral stress point. If that isn't enough my next plan will be rubber shock mounts. One way or another I'm going to make the four stroke smoother and quieter.
I know it's a little different, but this worked great. Maybe it will help a little.