From:Jim E
Subject:RE: Piston ring size for a 1963 175BTH? Date:Sun Oct 9 10:21:35 2011
Response to:16427
The 165 175 have the same bore, the 175 has a longer stroke.

I need to replace the pistong rings on my 1963 175BTH motor. I can only find listings for new 125cc and 165cc rings on sites such as Are the piston and rings in a 165cc and 175cc the same?