hello

my ring and pinion is gone in my bike.. are 350 Yamaha big bears interchangeable ? or any other bike thanks

 

Do you have it apart? Are you sure its the ring and pinion and not the axle due to bad bearings?

I think the Big Bear is dif gearing, you'll either be pushing or dragging the rear if you don't use the proper rear dif.

there's a used one on ebay for about the same prie as a new ring n pinion gear if thats the issue.