Congrats on the new Super! Check for worn bushing and tie rod ends in the front end. I replaced my bushings and replaced the tie rods with Rod ends. There's a write up around here somewhere. Same with front wheel bearings. Check out the lift arm and make sure it's not cracked. Also check the gap on the PTO and look for overheating in the wiring connectors on the left side relay for the PTO and the ignition switch. Pull the starter and go through it per Matt's write up on here. The biggest issue may be the Walbro carb throw it away and replace it with a rebuildable and adjustable carb off a KT17. I also have a thread on that. Check my profile. If you need picture references feel free to browse this album. Pics of everything I've done to my 1872. Down to frame and back a few times.
http://s172.photobucket.com/albums/w...cpZZ1QQtppZZ16