The full content of the kit is as follows:
Mitaka Piston Kit
Piston - High silicon aluminium alloy, CNC machined, Teflon coating in high friction areas, Double piston ring.
Rings - Are manufactured by Riken, the OEM for many motocross bikes. Excellent quality and durability.
Gudgeon Pin - Hollow, forged, steel alloy, chromed, high strength and hardness.
Piston to cylinder clearance 0.045mm-0.055mm
Mitaka Gasket Set
Head gasket, Base gasket, Exhaust valve gaskets, Exhaust pipe O-rings, Clutch cover gasket, Side case gasket, Reed valve gasket, Water pump gasket, Ignition cover gasket & various o-rings.
Mitaka Seal Set
Includes every seal in the engine, Main bearings, Countershaft, Clutch rod lever, Gear shift shaft, Water pump, Power valve, etc
Mitaka Complete Crank
Complete crank precision trued, engineered to OEM specification and materials using precision machining techniques. High quality steel alloy crank webs, chromed crank pin, quality big end roller bearing designed for high speeds (usually with flat silver bearing cages), forged shot peened connecting rod made using the latest steel alloy for OEM quality and strength, copper or silver thrust washers designed for high lubrication flow.
OEM Koyo Main Bearings
This kit comes with high quality Japanese Koyo main bearings, OEM for some Honda, Kawasaki, Suzuki and Yamaha motocross bikes.
Suits Yamaha YZ250 years 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022.
All Mitaka components are engineered to OEM specifications or higher using the same manufacturing techniques and high quality materials.