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I finally sorted it. After pulling and installing the gearbox three times and dismantling the clutch twice I finally realized that I was installing THE RING GEAR BACKWARDS!!!. It was overcompressing the clutch springs and, I suppose, hanging the clutch mount bolts up inside the bell housing. I’m not sure about this but I can’t think of another reason why the engine wouldn’t turn with the gearbox installed. Since the clutch thrust piece was pushing up against the flywheel bolts, the clutch wouldn’t disengage. All is fine now. On to the next learning experience.
On to the next learning experience.
Thanks for the kind words Jacksonracingcomau. They mean a lot. The bike is mostly back together save for the rear wheel. Once I get it mounted I’ll check everything over. The engine was turning over fine with the gearbox mounted with a bar turning the output shaft using half an old ujoint. I almost dropped the whole rig while uncrabbing the frame. Too many diverse balance points.
Follow manual and take pictures every step of way ,