Athena 53mm Complete 105cc Big Bore Motor Rebuild Kit! This is the best and most reliable rebuild kit on the. Fits Yamaha YZ85 2 Stroke Dirt Bikes. Years 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2103 2014 2015 2016 2017 2018. 53mm 105cc Nikasil Athena Big Bore Cylinder.
Larger Water Jackets For Better Cooling! Athena 53mm Forged Piston Kit (Includes, Piston, Pin, Rings & Clips). Hotrods Heavy Duty Crank Shaft. Hotrods Heavy Duty Main Bearings.
Bottom End Oil Seals Kit. This is a bolt on kit.