1.Diameter of cylinder:58mm 1.motorcycle 1motorcycle parts2.ISO/TS 16949:2003.Piston for auto,motorcycle,diesel engines,universal gasoline engines as well as internal combustion engines and so on.4.Piston ring,piston pin,piston kits,conrod, conrod bearing, eccentric shaft,liner,cylinder head, valve and so on.5.For European,Austrilia,Southeast Asia, American,Korean,Japan and so on.6.We can design ...