RE: What are you guys flying with the Ryobi 31cc.
Capt'n,
Yep, remove the flywheel and anything else not needed. Make a hub with the pickup magnet and a ring to hold the pickup sensor and your away. The hub might look heavy in the pics but is has six 8mm holes drilled in a hex shape in the pickup side. Sorry pics don't include the ignition box. Can take one of that if you like. As you may know, DA ignitions are made Down Under and I happen to be a friend of the guy that makes them. Very SWEET. He is a great guy. Will help out in any way.
Have now converted Jonsered 40cc chainsaw engine with DA ignition and that going into the Katana. Should give it a boost. First two pics are of the Ryobi second two are the Jonsered for those not in the know.