- Home Page /
- Automotive /
- Motorcycle & Powersports /
- Parts /
- Engine /
- Cylinder Heads /
- Cylinder Works 21003-K02 Big Bore Cylinder Ki...
0 ratings
Item #:
1200201
Cylinder Works 21003-K02 Big Bore Cylinder Kit
Item #:
1200201
NAD 17909
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Thursday, August 13
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
This 3mm over Big Bore Kit making 478cc with standard compression will give you the increase in horsepower and torque you are looking for.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Increased Performance
The Big Bore Cylinder Kit enhances engine displacement for superior horsepower and torque, providing riders with a noticeable boost in acceleration and top speed compared to standard kits.
High-Quality Materials
Made with durable materials, the Cylinder Works kit ensures longevity and reliability, significantly reducing the risk of wear and tear under heavy use, making it an ideal choice for serious enthusiasts.
Easy Installation
Designed for straightforward installation, this kit saves time and reduces labor costs, allowing riders to upgrade their bike quickly and efficiently without professional mechanics.
Product Details
- 3mm over Big Bore Kit for Yamaha YFZ 450R 2009-2013, YFZ 450X 2010-2011
- Increases horsepower and torque, making 478cc with standard compression
- Cast aluminum cylinder with Nickel Silicon Carbide (NSC) electroplating for durability and low friction
- Comes with a Vertex piston forged for strength and durability, with molybdenum disulphide coating for reduced wear
- Includes cylinder, piston, rings, wristpin, circlips, and special gasket kit with full instructions
- No machine work to engine or cases required for installation
Who Should Buy?
-
Performance Enthusiasts
Ideal for riders seeking improved engine performance and increased horsepower in their off-road or sport bikes.
-
Recreational Riders
Perfect for casual riders who want to enhance their bike's capabilities without extensive modifications.
-
Customization Fans
Great for users looking to modify their bike for a more personalized and powerful riding experience.
-
Casual Commuters
Not suitable for daily riders focused on fuel efficiency and reliability rather than performance upgrades.
Product Description
Cylinder Works 21003-K02 Big Bore Cylinder Kit
About This Item
Upgrade your Yamaha YFZ 450R or YFZ 450X for superior performance with the Cylinder Works 21003-K02 Big Bore Cylinder Kit. Designed for those seeking the ultimate high-performance machine, this kit will give you an impressive increase in horsepower and torque. The key to the enhanced performance lies in the 3mm over big bore, which takes the cylinder's capacity to 478cc with standard compression. The cast aluminum cylinder is coated with Nickel Silicon Carbide (NSC) electroplating, providing a durable, low friction surface.
This coating is wear resistant and has excellent oil retention capabilities. Additionally, it allows for improved heat dissipation to the water jacket, ensuring optimal engine temperature. Included in the kit is a Vertex piston that is forged for superior strength and durability. It is also coated with molybdenum disulphide, which reduces wear and allows for faster break-in.
The kit also comes with rings, a wrist pin, circlips, and a special gasket kit with full instructions for easy installation. The best part? This kit does not require any machine work on your engine or cases. Simply install the Cylinder Works Big Bore Cylinder Kit and experience the power and performance upgrade you've been dreaming of. Don't settle for average performance - unlock the true potential of your Yamaha YFZ 450R or YFZ 450X with the Cylinder Works 21003-K02 Big Bore Cylinder Kit. Upgrade your ride and dominate the competition.
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What engine models does the kit fit?
Answer: It fits Yamaha YFZ 450R 2009-2013, YFZ 450X 2010-2011. -
Question:
What is included in the kit?
Answer: The kit includes cylinder, piston, rings, wristpin, circlips, and special gasket kit with full instructions. -
Question:
Is machine work required to install the kit?
Answer: No, machine work to your engine or cases is required. -
Question:
Will this fit on a 2017 yfz450?
Answer: No, it will not fit. -
Question:
Can I still use pimp gas?
Answer: No, you cannot use pimp gas.
Cylinder Works Cylinder Heads Editorial Review
No editorial reviews found
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Pros
- Boosts engine performance
- Easy installation process
- High-quality materials used
- Improves acceleration significantly
- Compatible with various models
Cons
- May require additional tuning.
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
K
kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
OO
Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
SJ
SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
NAD 17909
Order now and get it around Thursday, August 13
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Kit provides increase in horsepower and torque
- Cast aluminum cylinder is Nickel Silicon Carbide (NSC) electroplated and durable
- Vertex piston is strong and durable with reduced wear and faster break-in
- Kit includes everything necessary and no machine work is required
- Fits Yamaha YFZ 450R 2009-2013, YFZ 450X 2010-2011
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.