When I was riding steep uphill on forest road, my bike suddenly lost traction. The engine worked fine, but no power goes to rear wheel on any of gears. Clearly major failure in a middle of nowhere :)
I called friends with off road trailer and we succeed to evacuate the bike.
At home we started to diagnose and first thought about failed clutch or final drive. We took out final drive (just as it’s easier) and realized that cardan shaft is not spinning (with engine running in a gear). We took out cardan and to the biggest surprise found the problem - the very end of gearbox output shaft broke from the gear shaft. Like somebody cut it wit a laser!!
I never experienced or saw something like that on any motorcycle in my life (I owned 6-7 during many years).
Did anybody hear or read about such failures and any reason (besides manufacturing defect) it may happen?
I’m thinking that replacing whole gearbox (but used on eBay?) is the best possible option. The alternative is to search for output shaft only and take apart gear box which sounds scary to the degree and probably not much cheaper at the end.
Any collective thoughts?
And the question - are gearboxes all same/identical for different years Stelvio 1200 4V? What about identicality between 4V 8V NTX etc? Just want to be sure which one to look on eBay.
Attached pictures of the broken part