Motorcycle Engine Accessory Piston Ring Kits For Honda CH250 Bore size STD 72mm 72.25mm 72.5mm 72.75mm 73mm +25 +50 +75 +100 Motorcycle Engine Accessory Piston Ring Kits For Honda CH250 Bore size STD 72mm 72.25mm 72.5mm 72.75mm 73mm +25 +50 +75 +100. Sale price : $9.10 Category : Motorcycle Equipments & Parts