Check out any of the twenty-seven E-16 Transmission components enlisted.
The most reasonably priced component used on the Cb650sc 1982 (c) E-16 Transmission is the Bolt,hex 6x12.
A sample from the products for the E-16 Transmission include: Plate A,thrust, Bolt,hex 6x12, Gear, C. Top(23t), Bush,spline 28mm.