Derbi GP1 (Piaggio Engine)
PiaGGIO OEM KICKER CUP
$ 24.99
This is REQUIRED for all rc one builds, and works on oem piaggio typhoon, 49cc etc. Don't be fooled with the non oem piaggio ones, they don't fit, and you risk damaging your splines! If you have an rc one and went down this path you've likely already experienced this.