[fastdruid]

Sounds to me like the clutch has broken and jammed.

If it was *just* gearbox then you should be able to start it with clutch in.
If it was engine you should be able to push it in neutral or with clutch in.
If it was rear wheel then you should be able to start it in neutral with clutch in.

Of course it could be bits from one failure jamming something else...

Not worth getting gearbox/engine replaced, refund and new bike IMO.

Druid