Aprilia SX 50 12-17 (D50B) ZD4PV Narkaku HD Crank Bearing & FKM Seal Kit. Naraku HD Crank Bearing & FKM Seal Kit - Derbi EBE/EBS & D50B0 50cc. FKM Premium crankshaft seal rings. FPM, FKM, Viton® This product is suitable for the Aprilia RS4 50 2014-2017 (D50B0) ZD4TK0008 / ZD4TK0000 / ZD4VX.
