cylinder kit Polini aluminum sport 70cc 47mm for Malaguti Dune 50, Minarelli MR4 133.2004

70cc aluminium cylinder kit from Polini for Malaguti Dune and Minarelli MR4 geared mopeds. The cylinder has a 47mm bore and achieves an output of 10.5bhp at 11,500RPM according to manufacturer´s claims.