I do have a few two speeder questions you might be able to answer..
– In order to change the high gear sprocket the magneto sprocket will have to come of. How is this attached to the drum and how can it be taken of? There seems to be some sort of locking ring around it with two notches at opposite sides.
– Currently some new blind head barrels are being cast. Those are of the RZ/RY type. Does anyone know if the patters to cast new Super Squirrel barrels still exist somewhere?
The ratchet ring retaining the mag sprocket is right hand threaded
to remove it you need to drive it using the sloping flanks of the teeth.
I have made a tool from an old ratchet welded to a lever. A bolt
passes through this assembly, the drum and a strap across at the
rear. A nut holds the assembly together. This allows you to unscrew
the ring. Only finger tighten the nut to allow the thread to move. The
notches in the ratchet are for a tool/’C’ spanner but I think you would
be lucky if it worked as they are usually up very tight.
Hope this helps.