Primary chain

I discovered by accident a piece of split pin/cotter while draining the primary chaincase. It turned out to be one (of the two) from the joining link. Pictured here with missing split pin. How lucky can you get??

 The primary case had been sealed with silicone sealant. While it didn't create any problem there, it was a major problem on the crankcase halves when I rode the bike in the early 90's. Little bits of silicone would break away and lodge in the oil scavenge valve causing it to wetsump.

The primary case will be sealed solely with Loctite 515 (no paper gasket)