OEM Style "Stuffer" Crank 50/70cc - 10mm Pin x 80mm Rod (39.2mm Stroke) (ON SALE - LTD QTYS)Racing Crankshaft reinforced pin=10mm Minarelli horizontal (Yamaha Aerox) High Compression crankshaft. Similar to the reinforced crankshaft but with additional plastic padding to increase primary compression. It's actually made by the same manufacturer as several other crankshafts by well known brands, the only difference being the different plastic colours and of course the prices. We recommend to use HC crankshafts like this one only in conjunction