Renthal 1500-520-49GPBU Engine Timing Idler Sprocket

Unique flat face design keeps weight to a minimum and means the TwinRing is as narrow as a regular chainwheel. Inner Ring is high strength Ultralight 7075 T6 Aluminum. Outer Ring is Electroless Nickel Coated steel. Outer is expanded at 200C and then fitted to inner, creating a permanent bond for the life of the sprocket. Precision CNC machined to extremely tight tolerances. Flat socket head screws add additional strength to the chainwheel during side impacts. Self-cleaning mud grooves between every tooth on both sides help prevent dirt build up.This item fits the following models: 2001-2009 Yamaha WR250F2011-2013 Yamaha WR250F1999-2000 Yamaha WR400F2001-2002 Yamaha WR426F2003-2009 Yamaha WR450F2011-2013 Yamaha WR450F1999-2013 Yamaha YZ1251999-2013 Yamaha YZ2502001-2013 Yamaha YZ250F1999 Yamaha YZ400F2000-2002 Yamaha YZ426F2003-2013 Yamaha YZ450F