Hey guys,

I currently have two engines, a WS7 II and WS7 III L2G. Love both of these engines. Neither of them have more than 1.5 gallons through them. When I first started this hobby I was convinced to by a RB engine and got a S7. That engine lasted 12 gallons before I sold it.

With all the new naming of the RB products I am confused. It used to be that the WS7 series engines had the black painted cases and the only one I see now is the B10 that is painted. Previous posts show that the B10 is more like a C5/C6 than a WS motor. What is the equivalent to the WS motors now. The reason I asked is that my WS7II just had the bearings replaced and the LHS that did it for me stated there were small scratches, possibly from overheating, on the piston but that it "should" be ok. So I need a piston and sleeve with con rod and am not sure what one to get.

Any help is appreciated.