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THE STANDARD BORE ON A QA50 IS 42MM

THE PISTON TO CYLINDER CLEARANCE SHOULD BE 

FROM .01 TO .05 MM OR .0004" TO .0020"

YOU CAN HAVE .11 MM OR .005" BEFORE YOU NEED TO BORE.

THE STANDARD BORE ON A QA50 IS 42MM

THE PISTON TO CYLINDER CLEARANCE SHOULD BE

FROM .01 TO .05 MM OR .0004" TO .0020"

YOU CAN HAVE .11 MM OR .005" BEFORE YOU NEED TO BORE.

*QA50 PISTON 58B