Add to Cart VERTEX Big Bore Piston kit Ø 68.00 +2.00 Honda CRF150R MSRP: Now: £153.45 Was: Piston Kit (Pro Big Bore) Pro-BB – Forged piston in original OE form for big bore cylinder All pistons are heat-treated with a T-5 hardening and tempering cycle All piston skirts are coated with a high-tech Molybdenum Disulphite coating for... MSRP: Now: £153.45 Was: Add to Cart