In Stock Engine parts Dio50 125cc big bore kit Jiso 54mm cylinder 52.4mm forged crankshaft 222311 USD 750 Big bore kit air cooling 125cc for Honda Dio50 Af18. Kit includes Jiso racing parts: cylinder kit with forged piston 54mm and 14mm wrist pin, forged crankshaft 52.4mm long stroke, cylinder head, longer studs, needle roller, crank bearings and oil seals. Add to cart