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*IMPORTANT NOTICE: Due to increase in fraudulent orders the billing & shipping address must match when placing your order. Thank you for your patience and understanding.
*IMPORTANT NOTICE: Due to increase in fraudulent order the billing & shipping address must match when placing your order. Thank you for your patience and understanding.
400EX 400X 89mm Hi Comp Big Bore Kit Race Gas 12.5:1 Piston +4 Rebuild 440cc Kit

400EX 400X 89mm Hi Comp Big Bore Kit Race Gas 12.5:1 Piston +4 Rebuild 440cc Kit

by BPRATV
Save $82.01 Save $82.01
$461.99
$461.99 - $461.99
$461.99
$379.98
$379.98 - $379.98
$379.98


  • NEW 89mm big bore cylinder
  • 89mm Wiseco 12.5:1 big bore forged piston
  • Nitrite-coated piston rings
  • Chrome wrist pin
  • Circlips
  • Cometic big bore top-end gasket kit
  • Cometic MLS head gasket
  • Talon TITANIUM cylinder head stud kit - LIFETIME WARRANTY*!
  • NGK spark plug
  • HD cam chain conversion
  • Piston uses pump or race gas
  • Works on all Honda 400EX, 400X, and XR400R models and years
  • 1-year warranty*
This is a bolt-on kit that requires no machining of any kind.  Runs on pump or race gas.  Everything is new in the original packaging and the manufacturer's warranties apply***.

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