High performance Carenzi crankshaft full circle Evolution type suitable for Minarelli AM6 for Aprilia, Beta 50 RR, CPI, Fantic, MBK 50X-Power, Yamaha 50 TZR, Peugeot 50 XPS, Rieju 50 RS, Motorhispania RYZ, Sherco SE/SM. According to the manufacturer tested stable up to 16.000rpm. Precisely manufactured in Europe and best suitable for tuning. Comes with silver plated cage small end bearing for 12mm wrist pin.