1. Made a collar remover from an old 1/2" drive socket from a pawn shop (50 cents and 5 minutes).
2. Bought a Shimano bicycle crank remover for 22mmx1mm cranks at a good bike shop $16.00
3. Welded crank tool to old slide hammer. 10 minutes
4. Removed prechambers from head which was off the engine (6 minutes, one was really stuck).

It's not ready to loan but will be Monday. I need to grind the welds. I'm not ready to hear you guys open a post on dirt dobbers.