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YZ450f 04-09 100mm Cylinder

Our 100mm big bore cylinders feature many innovative designs to create the most reliable and strongest cylinder on the market!

  • Proprietary cylinder machining increase gasket sealing to eliminate head gasket issues

  • Utilizes custom steel sleeve for maximum strength (steel is much stronger than aluminum cylinder with coatings. This is the reason all major auto manufactures have aluminum blocks with steel sleeves!!!!)

  • Designed with additional piston skirt support improving piston and cylinder wear

  • Built in clearance for large stroke cranks

  • Bolts on with no case modification

  • Better ring seal and less blow by results in more power

  • Excellent cooling characteristics for the most demanding racing situations

  • Last longer and is more reliable (no coatings to flake off)

  • Great option to fix damaged stock cylinders, and if sleeve becomes damaged a new one can be installed quickly

  • Retains 100% stock OEM look for a stealthy engine build

These cylinders work perfectly with our +5mm crank to create a 540cc engine!

$399