Cylinder Works Big Bore Cylinder Kit - 21107-K01

Item # : 228681

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List : $954.95


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  • Manufacturer: Cylinder Works



Cylinder Works Big Bore Cylinder Kit

  • (+5mm Big Bore Kit) makes 107.8cc. Std compression. Uses Vertex #23628. *Must modify cylinder head and use +2mm stroker crank
  • Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders
  • Three kit options to choose from: Standard Bore, Standard Bore Hi-Compression and Big Bore
  • Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise
  • Nickel Silicon Carbide plated for long life
  • Kits come complete with gaskets, cylinder, piston, rings, pin and clips
  • Big bore cylinders do not require machine work (unless noted)

Fits: 2002 - 2014 Yamaha YZ 85

Technical Specifications:
  • Compression Ratio (x:y): 8.2:1
  • Cylinder Diameter (mm): 52.50
  • Displacement (cc): 107.80
  • Piston Diameter (mm): .00
  • SizeOverStandard: 5.00

Manufacturer Part Number: 21107-K01