Dec 12, 2010 #1 E Eva Member Joined May 23, 2008 Messages 133 Reaction score 0 Points 16 ...inside the skirt,what are these? I have a 292 Hirth engine, the piston has the numbers 74L44 and R021M printed inside the skirt,what are these numbers suppose to mean? Would the number 71144 and R011 be the same?
...inside the skirt,what are these? I have a 292 Hirth engine, the piston has the numbers 74L44 and R021M printed inside the skirt,what are these numbers suppose to mean? Would the number 71144 and R011 be the same?