Don------
Keith Black #KB166. These are hypereutectic cast pistons that are WAY, WAY stronger than the original conventional cast pistons used for your application. With your .030" overbore, stock cylinder heads (60 cc, nominal), and stock-type head gasket (steel shim, .018"), these pistons will yield a final compression ratio of right at 10.4:1. That's about as close as you can get to the original CR of 10.5:1 (in fact, that original ratio was very "optimistic"; it was really probably more like 10:1).
You can buy these pistons for about $275 for a set of eight from Summit Racing and they have them in stock for immediate shipping. What more could you ask for?
Keith Black #KB166. These are hypereutectic cast pistons that are WAY, WAY stronger than the original conventional cast pistons used for your application. With your .030" overbore, stock cylinder heads (60 cc, nominal), and stock-type head gasket (steel shim, .018"), these pistons will yield a final compression ratio of right at 10.4:1. That's about as close as you can get to the original CR of 10.5:1 (in fact, that original ratio was very "optimistic"; it was really probably more like 10:1).
You can buy these pistons for about $275 for a set of eight from Summit Racing and they have them in stock for immediate shipping. What more could you ask for?