YAMAHA YZF R1 2009-2014 Forged piston kit of the extra class 78.00 mm

The pistons are supplied with matching piston rings, pins and clips. The cylinder must be re-honed with special diamond honing

stones. The cylinder honing is necessary with regard to the correct running clearance and the surface roughness corresponding to

the piston ring. The original crankshaft does not have to be fine-balanced for these pistons.