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OEM Yamaha YZ 85 Cylinder B4B-11311-00-00 2019-24

Genuine OEM Yamaha YZ 85 cylinder. This is a professionally remanufactured Yamaha YZ 85 cylinder that has been Nicasil plated back to exact OEM specifications and Diamond honed to ensure proper ring seating and OEM longevity. Simply check/set your ring gaps, wash, and install.

Remember, a properly sized cylinder and Matched piston (see our Stage 1 kits) are CRITICAL to a good top-end rebuild, MCB components take the guess work out of your build!

Due to rarity and difficulty in obtaining good cores, we have implemented a policy that REQUIRES the customers core to be shipped to us and inspected BEFORE we will fill the order.

Select your casting numbers below. 5PA00
Pricing: $399.95

Customize Your Item

- Select your Casting number -
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- Core Returns -
 * required


MCB also offers Three stages of Yamaha YZ85 engines rebuild kits.
- Stage 1 Piston kit. See our SKU#23430961
- Stage 1 Piston kit with cylinder. See our SKU#23431323
- Stage 2 Rotating kit, crankshaft and piston kit. See our SKU#23431201
- Stage 3 Rotating kit, plus cylinder. See our SKU#23431322

MCB Performance specializes in only engine components and rebuild kits. We've been doing this since 1994 and we refuse to sell parts that are not proven, and that are not of a standard we would use.

MCB uses Wössner pistons exclusively in all our MX/Off road kits. Germany's finest aftermarket forged piston manufacturer with over 25 years of experience in the Powersports / racing industry.

Wössner is currently the piston of choice for Monster Energy Star Yamaha Racing Team


  • 23431325
  • 23431325
  • Yamaha
  • New

Shipping Information

  • Item Requires Shipping
  • 4.0 lbs.
  • W6.0000” x H9.0000” x L12.0000”

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