Bolt Motorcycle Hardware's Four-Stroke Engine Fastener kits include bottom-end hardware for the following: Crankcase Covers Clutch Cover Oil Filter Cover Crankcase Case Saver Water Pump Does not include engine-to-frame mount bolts.This kit fits the following models:YZ400F 1998-1999YZ426F 2000-2002YZ450F 2003-2005WR400F 1999-2000WR426F 2001-2002WR450F 2003-2006 Fits: Yamaha YZ400F 1998-1999 YZ426F 2000-2002 YZ450F 2003-2005