The folks at TBoltUSA have earned the Pardue Brothers respect. Nice people here in the USA, with a passion for bikes. They sell replacement engines, plus many parts and pieces

Pardue Brothers hunts for the best parts and tools for production.  When it comes to terminals and connectors, we buy from Vintage Connections first. In the thousands of their terminals we have installed and sold on our products since March of 2012,  zero connector failures have been reported.  In the shop and on customer bikes. 

Beatrice Cycle, also known as Dr. ATV stocks parts for many vintage Honda bikes with horizontal engines.  They often have parts you cannot locate anywhere else, even some reproduction pieces.