Manufactured by Namura Kit includes piston, rings, pin, clips, wrist pin bearing top end gasket kit you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Namura gaskets use performance materials to increase durability and provide greater reliability Includes all gaskets pictured to rebuild top end Kit is for standard bore size 54.00mm Size A piston is 53.95mm Compression ratio of 10.7 1 Made in Taiwan Fits 2005 Yamaha YZ125 2006 Yamaha YZ125 2007 Yamaha YZ125 2008 Yamaha YZ125 2009 Yamaha YZ125 2010 Yamaha YZ125 2011 Yamaha YZ125 2012 Yamaha YZ125 2013 Yamaha YZ125 2014 Yamaha YZ125