Metrakit SP Serie Big Bore Kit Fits RS50 2006-2007 With The Derbi Engine "D50BO" under seat exhast This Is The Best "Road Bike " Big Bore Kit You Can Buy For RS50, Nice Spread Of Power With A Peak RPM Of 13.000. The Cylinder Is Made From Aluminium And Ni + CSi Treated For Better Performance.
Kit Contains
Piston Kit 47.60mm,Gaskets
Cylinder Head,Cylinder 47.60mm 70cc
This Kit Is best Used With A 21mm Carb And The Metrakit RK Race Exhaust