!Keep the shocks! My bike is shockless, it only has a sprung seat, and it's rough rough rough, even over just cracks in the road. Shimano makes really cool thumb and finger shifters, and they're called trigger pull shifters: https://www.google.com/search?q=shim...r+pull+shifter
And, that bike looks good, but, the frame tubing might be a bit big for the engine mounts to fit around if you're going for a a 2 stroke. However, you can make or buy custom engine mounts, sickbikeparts.com sells universal engine mounts.