- The piston is 87mm, which happens to be 1mm much larger when compared to the common 86mm, and the material is lightweight and robust A4032 cast aluminum alloy. The required clearance of 0. In any case… If a crank incorporates a 0.02mm runout, that means it will require up https://cruzsrqnm.xzblogs.com/69682000/5-simple-techniques-for-used-rb26-engine