Excellent quality Airsal 89ccc aluminium cylinder kit at a cast iron cylinder price. Features a hard-chromed bore for improved heat dissipation. Provides good torque and works well with original or touring exhausts. Cylinder is supplied with a modified variator plate to best take advantage of the cylinder. Good improvement in performance and torque can be achieved. Supplied as shown in image. Cylinder head included, carburettor will require up jetting or better still replacing with a larger carburettor.