1992-1998 Yamaha YZ250 YZ 250 WR250 WR 250 Namura 68 mm Bore "C" Moly Piston Kit | eBay
PISTON KIT 160-200cc B=68mm Pin=18mm H=53.4 Ctr Pin to Top=23.5 Honda Type GX160 -GX200 and Other 5.5HP (163cc) - 6.5HP (212cc) Motors Used on Generators, GoKarts, Minibikes, Power Equipment [815472] : Get
68mm Pin 15mm Motorcycle Piston and Piston Ring Kit For HONDA CBR600 CBR 600 CBR600F5 07 15 +100 Oversize 1.00 +1.00mm| | - AliExpress
Polini Piston Ring (68 mm, Upper Dyke) Scooterworks USA