man that chainsaw is top of the line. I would love to do a friction drive with a full suspension using that. My worn out 42cc craftsman is dynamite I bet that thing would sing.
That 42cc is nothing to sneeze at either. They would both make big strong friction drive bikes. I am learning a lot about these things and they can get really beefy and with good performance. Most of mine have been small engine bikes but if I got hold of a good 50cc engine I would build a really strange bike on a full suspension frame.
The way the setup on the rear has to be you could keep all the original brakes and even the gears on a mountain bike. You would just have to add a throttle control like on the china bike.
It would be a nightmare of lever and twisty controls though. A techie's wet dream. Two brake levers, two shifters, one throttle control motorcycle type, and then the suicide clutch on the bike frame lol.
My poor squashed brain would never be able to work all that.