for PIAGGIO for Sfera/ ZIP Racing 50ccm 2T AC/ LC pin 12mm TUNING ROAD – for everyday use Product description TheRMS Racing crankcase plows down the no-man’s-land between priceworths STANDARD crankcases and high end products from POLINI and MALOSSI. This is a fair compromise between price and performance for those wanting all the advantages of a racing crankcase but don’t want the higher costs. Reduced weight through high-tec synthetic material for full circle case. MINARELLI crankcases have rod bearings for 10er bolts, PIAGGIO has rod bearings for 12er bolts. MINARELLI horizontal pilots can fall back on 12er bolt rod bearings from CARENZINI in case a tuning cylinder requires it. TIP! Don’t forget new bearings, gaskets and oil seal rings.