Easiest is to use a rattle gun to remove the Jesus nut. You could also block the balance shaft drive with a small block of light alloy if working with a regular wrench, but you do need to be very careful with that. Other alternative would be to remove the clutch cover together with all the pump paraphernalia and block the primary drive... far too much hassle.
No further need for pullers, all cylindrical sliding fits, no tapers.
Parts are available from OCT, octeam@gmx.de
Might consider a starter drive upgrade while you're at it, comprises of a new sprag drive gear with the appropriate idler gear, reduces starter ratio so it actually works... mostly! The alternator cover needs slight machining to make space for the modded idler gear, would need to send in the cover for that.
When reassembling, a diaphragm spring washer should be used under the alternator rotor nut. The fit and seating of the rotor should also be checked. Might be necessary to relieve the rear face of the rotor to include a sturdy washer on which the rotor can be tightened against instead of the tiny step on the crank.
While it's all apart, it is also worthwhile to check the balance shaft for loose counterweights... tip of the iceberg, remember!
piet
