Hi John,

 

I am using a rubber pipe cap (used for a cast iron pipe) as my master cyclinder cap. It seems to work and fits snugly without the clamp that it cam with, I found it at the local ACE hardware store.

 

"Pipeconx" by Uniseal,  Made in USA. Evaansvill, Indiana

 

 1-1/2 inch cap fits my 65 patrol..