The Bolt (6g1) is the most widely applied product in the 6J/8J 1986 UPPER CASING ( six times ).
A sample from the products for the Upper Casing include: Bolt (682), Bolt (6g1), Gasket, Exhaust Manifold 1, Boot, Shift Rod.
The Yamaha UPPER CASING has thirteen products enlisted in the schematic.