2Bros Parts

CYLINDER ONLY BIG BORE 63mm OVER SIZE 2008-2012 WR YFZ-R 125 MX-09155-1

$172.47

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Delivery to United States 5–8 business days

Spread the cost with Klarna

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Big bore cylinder replacement with a 63mm bore. Manufactured to OEM specifications with a Nikasil-plated sleeve for wear resistance. Features a cylinder-only design and typically allows for drop-in installation without case modifications. Specifications include AB4C aluminium material with a Nikasil-plated sleeve, bore size of 63.00 mm, coating hardness of HV500–600, and coating thickness of 0.08 ± 0.02 mm. Cylinder material spec is JIS AC4B-T6 aluminium with a hardness of HR65+. Cross-reference OEM part numbers include PSYCHIC MX-09155-1, 56-K139.63.CYL, 22BE13111000, 22BE13112000, 22B-E1311-10-00, and 22B-E1311-20-00.

Specifications
SKU
56-K139.63.CYL
Brand
Dirt Racing
Availability
In Stock (9)

Fitments (15)

MakeModelYear
YAMAHAWRF R 1252008
YAMAHAWRF R 1252009
YAMAHAWRF R 1252010
YAMAHAWRF R 1252011
YAMAHAWRF R 1252012
YAMAHAWRF X 1252008
YAMAHAWRF X 1252009
YAMAHAWRF X 1252010
YAMAHAWRF X 1252011
YAMAHAWRF X 1252012
YAMAHAYZF R 1252008
YAMAHAYZF R 1252009
YAMAHAYZF R 1252010
YAMAHAYZF R 1252011
YAMAHAYZF R 1252012
General Product Group
Engine
General Product Type
Cylinders & Heads
General Size
63mm
Variant Id
252843
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Big Bore Cylinder Replacement - 63mm Oversize

Enhance the performance of your compatible Yamaha or Rieju motorcycle with this high-quality big bore cylinder. Designed as a cylinder-only replacement, this part is manufactured to meet original equipment manufacturer (OEM) specifications. It features a durable Nikasil-plated sleeve, ensuring excellent wear resistance for extended engine life.

Key Features:

  • Cylinder only replacement part
  • Manufactured to precise OEM specifications
  • Nikasil-plated sleeve for superior wear resistance
  • Designed for straightforward installation, typically without requiring case modifications

Specifications:

  • Bore Size: 63.00 mm
  • Sleeve Type: Nikasil
  • Sleeve Hardness: HV500–600
  • Sleeve Coating Thickness: 0.08 ± 0.02 mm
  • Cylinder Material: AB4C aluminium
  • Cylinder Material Specification: JIS AC4B-T6 aluminium
  • Cylinder Hardness: HR65+
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).

Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.

Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.

Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.

More answers in our FAQ.

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