Fitting a new PistonPin/S is advisable when rebuilding the engine. The old item/s may well have worn and could allow a 'loose' little end bearing with potentially catastrophic engine damage and a most unpleasant noise!
Please check out our gasket sets, and Piston kits for this type of machine, if you are considering any serious engine work.
Before placing your order, check carefully to ensure you are specifying the correct part number for your bike.