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03+ YZ250 YZ 250 Ported Cylinder Porting Head Complete Top End Rebuild Parts Kit

$1,199.99

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Compatible Vehicles
Submodel Year Make Model
-- 2020 Yamaha YZ250
-- 2019 Yamaha YZ250
-- 2018 Yamaha YZ250
-- 2017 Yamaha YZ250
-- 2016 Yamaha YZ250
-- 2015 Yamaha YZ250
-- 2014 Yamaha YZ250
Team Yamaha 2014 Yamaha YZ250
-- 2013 Yamaha YZ250
Team Yamaha 2013 Yamaha YZ250
-- 2012 Yamaha YZ250
Team Yamaha 2012 Yamaha YZ250
-- 2011 Yamaha YZ250
Team Yamaha 2011 Yamaha YZ250
-- 2010 Yamaha YZ250
-- 2009 Yamaha YZ250
-- 2008 Yamaha YZ250
-- 2007 Yamaha YZ250
-- 2006 Yamaha YZ250
-- 2005 Yamaha YZ250
-- 2004 Yamaha YZ250
-- 2003 Yamaha YZ250
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FITS ALL 2003 AND NEWER YAMAHA YZ250 TWO STROKE DIRT BIKES
  • Aftermarket 66.40mm cylinder
  • Stage 2 trail/MX port
  • Aftermarket cylinder head
  • Wiseco or Wossner 66.40mm forged piston**
  • Piston rings
  • Wristpin
  • Circlips
  • Top end gasket kit
  • MAXLOCK head stud kit
  • Cylinder to case dowel pins
  • 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.