Re: Building a mono-shock frame to mount any size tire or engine.
Miked I see you ordered tubing for bicycle frames when it looks like you are going to build a bike that should be built out of motorcycle tubing. The GC160 is not a light motor, has some good torque and you plan on having a swing arm on the bike, thats going to require a structure built to withstand alot.
I noticed on your bike that your seat has no springs, have you ever tried a spring type seat on that bike? Just wanted to see if it road any better with one.