Cylinder Works Big Bore Cylinder Kit - 21007-K01 | Yamaha YZ85 2004-2014

Item # : 228680

Checking Fitment…
No vehicle selected
Select Vehicle
Guaranteed fit
Does not fit

Processing Time: Leaves our warehouse in 3 to 5 days.

* Required Fields

List : $844.99


9% off

Please enter a valid email.
Signing up...
Thanks! We will notify you by email when this item is back in stock.
  • Free Shipping on orders over $49*
  • Canada
  • Easy Returns
  • SSL Secure


  • Manufacturer: Cylinder Works



Cylinder Works Big Bore Cylinder Kit

  • (+5mm Big Bore Kit) makes 103.5cc. Std compression. Uses Vertex #23628. *Must modify cylinder head
  • 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): 103.50
  • Piston Diameter (mm): .00
  • SizeOverStandard: 5.00

Manufacturer Part Number: 21007-K01