I had Same problems a while back.1200 was in the body shop for a month When time to move no gear selecting,Jacked up the back and tried to accelerate no spining of the wheels.




Turned out notting happed to the box we had to take it down.



When we took it out the clutch disc was stuck to the flywheel due to moisture in the garage.



We sanded the disc a bit then put it back together,everything worked fine afterthat.

Hope this helped,Cheers Darren