This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox.

Cart

YZ250 YZ 250 Big Bore Kit 72mm Cylinder Ported Head Valve Complete Rebuild Kit

$749.99

FITS ALL 2003 AND NEWER YAMAHA YZ250 TWO STROKE DIRT BIKES
  • Wiseco 72mm forged big bore piston
  • Piston rings
  • Wristpin
  • Circlips
  • Hotrods or Wiseco HD crank with rod
  • Crank bearings
  • Transmission bearings
  • Shit cam bearings
  • Water pump bearing
  • Complete gasket kit - top bottom head base case and pump covers
  • Complete engine seal kit
  • MAXLOCK head stud kit
  • Spark plug
  • Stickers
Head works with all OEM or after market components.  Piston uses pump or race gas.  Works with stock or after market valve springs.  Everything is brand new.

CONTACT US FOR ALL YOUR HONDA 400EX NEEDS!

Please check your order thoroughly when receiving it.  If for any reason at all you are not 100% happy please contact us right away so we can help resolve the issue.  

*We recommend that this kit be installed by a qualified mechanic with experience working on these types of motors.  Warranty does not include any failure that is a result of improper installation, improper tuning, improper break in, or misuse.  Piston comes with specific instructions for setting the ring gap.  If you do not follow these exactly your motor will fail.  For any warranty to be considered the part(s) in question must first be sent to us and possibly the manufacturer for inspection.  We can not warranty parts based on photos or phone calls alone.