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Attention: You are purchasing closed course competition Product(s)

I acknowledge that the product(s) being purchased () was/were designed and intended for closed course competition use only. The product(s) is/are neither designed nor intended for use on public roads or land and is against Federal and State regulations to do so. By proceeding with this purchase, I , agree to only use the product(s) for closed course competition.

If an ECU tune was purchased, please send your unmodified and undamaged OEM ECU to TST Industries, located at 623 Pleasant St, Lake Helen, FL 32744.

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FREE SHIPPING OPTION FOR DOMESTIC ORDERS:

U.S. customers are offered a free shipping option for orders with a discounted subtotal greater than $150.00 (before taxes applied). The order's shipment destination must reside within the United States of America. The free shipping options still utilize our standard postage providers and 3rd party shipping companies. Does not apply to large items such as exhausts, stands, and bodywork shipping. All terms and conditions that apply to normal orders will continue to apply to orders with a free shipping option.

NO RESTOCKING FEES:

An item returned within 30 days of purchase, that includes an accurate RMA#, in a perfectly new, unopened condition, and that complies with our other return policies, will not be charged a restocking fee.

MOST QUESTIONS ABOUT THIS PRODUCT CAN BE ANSWERED ON THIS PAGE.

The most common product related questions are answered in the tabs section on this page. Be sure to carefully read through the "Product Details", "In the Box", and "FAQs" tabs. In addition, a lot of our products have comprehensive videos demonstrating installations and product features. You can find those videos in the "Videos" tab.

Note: Some product pages may not have all the tabs mentioned above. Please read through all the available tabs to find the answers to your questions. If you still need assistance, please use the "ASK A QUESTION ABOUT THIS PRODUCT" button below the tabs section.
NO ADDITIONAL COST: You pay at the time of checkout and never have to worry again.
COVERAGE: Our Limited Extended Warranty starts on the date of purchase. It covers all manufacturer defects for our TST Exclusive products. (Products manufactured by us with the exception of our WORX products)
EXPERT HELP: As always our team is here to help. If you’re unsure about this warranty or if your product is eligible, feel free to reach out to us and we can help answer any questions you may have!
PRODUCT ELIGIBILITY: TST will offer our Limited Extended Warranty on all products manufactured by TST Industries.
EASY CLAIMS PROCESS: Simply click the “Contact Us” page and fill out the “Returns Form” to begin the warranty process. Once our team receives your email and initiates the RMA, you can send your product back to us and we will repair/replace the product at no cost as long as a manufacturer defect is found. What qualifies as a manufacturer defect? Check out our Terms and Conditions for some examples!

TST WORX 520 Lightweight Aluminum Rear Sprocket for Kawasaki Ninja 250R, Ninja 300, & More

  • TST WORX 520 Lightweight Aluminum Rear Sprocket for Kawasaki Ninja 250R, Ninja 300, & More
  • Increase component performance on your Kawasaki Ninja 250R / 300 with the TST WORX Rear Sprocket.
  • CNC machined using specifically designed techniques to ensure extreme precision.
  • Ultra lightweight 7075-T6 aluminum alloy construction improves performance and durability on your Kawasaki.
  • The TST WORX Rear Sprocket was designed bring performance to the track or street.
  • Developed, tested, and proven on our Moto3 National Championship winning TST R3 Superbike.
  • Anodized black hard coat increases durability and style.
  • Utilized on our TST Kawasaki race bike.
  • Low frictional loss design improves power transfer and performance.
  • Close up view of the TST WORX durability demonstrated on the Yamaha MT-07 after 4,000 miles.

TST WORX 520 Lightweight Aluminum Rear Sprocket for Kawasaki Ninja 250R, Ninja 300, & More

TST WORX 520 Lightweight Aluminum Rear Sprocket for Kawasaki Ninja 250R, Ninja 300, & More

Our TST WORX 520 Lightweight Aluminum Rear Sprocket was developed to provide dramatic component weight loss and exceptional durability by combining high-quality 7075-T6 aluminum alloy with advanced manufacturing and hardening anodized finishing techniques. So whether you're riding the street or dragging elbow at the track, our TST WORX Rear Sprocket was designed to provide increased and long-lasting performance on your Kawasaki sportbike.

Available in 40-48 tooth counts.

Applications: CHECK SPECS TAB

 

This product is part of our Worx Program!

Learn More!
Have a Question About This Product?
SKU
2008 - 2012/Ninja 250R/Kawasaki
TST WORX 520 Lightweight Aluminum Rear Sprocket for Kawasaki Ninja 250R, Ninja 300, & More
 
Price: $69.99
Select Tooth Count
Quantity

ATTENTION:

If buying this product as part of the Buy Together bundle below, define these options there.

▾
  • Product Details
  • Specs
  • In the Box
  • Recommended Accessories

Features

  • CNC machined from lightweight 7075-T6 aluminum alloy using advanced techniques
  • Full sprocket treatment with Type III black anodized hard-coat for long-lasting durability
  • Proprietary matte black anodized finish
  • Proprietary tooth profile
  • Ultra-smooth tooth transition geometry
  • 58% lighter than the stock Kawasaki rear sprocket
  • Available in 40-48 tooth profiles
  • Compatible Kawasaki model list located in the Spec tab

Description

Designed and built by race engineers in the TST WORX race program, our Lightweight Aluminum Rear Sprocket was developed with the harshest riding conditions in mind. Our use of the best materials and manufacturing procedures ensure practical longevity while maximizing weight loss for increased performance and power delivery. The blend of high-quality material, advanced hardening procedures, lightweight design, proprietary tooth profile, and ultra-smooth tooth transitions ensure exceptional performance even during the most demanding riding situations.

We produce every TST WORX Rear Sprocket from 7075-T6 aluminum alloy. This high-quality material is CNC machined using a propriety holding plate process developed to eliminate vibration during the machining process and ensuring extreme precision and material integrity. We then treat the entire rear sprocket with a matte black Type III hard coat anodizing process that penetrates the aluminum and builds an ultra-hard surface layer, resulting in a light weight sprocket with exceptional durability characteristics capable of taking on the rigorous demands of the street and track. It's time to give your Kawasaki the sprocket and performance it deserves.

Be sure to check the "Specs" tab for even more info on tooth count, sprocket weight, and fitment.

Application Spec Sheet

Model Years OEM Pitch OEM Front Sprocket OEM Rear Sprocket Chain Length
Kawasaki Ninja 250R 2008 - 2012 520 14 45 106
Kawasaki Ninja 300 2013 - 2017 520 14 42 106
Kawasaki Versys-X 300 2017 - Current 520 14 46 112
Kawasaki EX250 1988 - 2007 520 14 45 106
Kawasaki Ninja 500 2006 - 2009 520 16 41 104
Kawasaki ER500 2000 - 2005 520 17 42 106

WORX Rear Sprocket Weight Guide

Sprocket Tooth Count Weight (ounces)
40 Teeth 7.97 ounces
41 Teeth 8.47 ounces
42 Teeth 8.82 ounces
43 Teeth 9.17 ounces
44 Teeth 9.59 ounces
45 Teeth 10.09 ounces
46 Teeth 10.45 ounces
47 Teeth 10.87 ounces
48 Teeth 11.31 ounces
  • (1) TST WORX 520 Lightweight Aluminum Rear Sprocket (your choice of tooth count)
  • 1 Year Warranty (See our warranty policy here)
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TST Sequential LED Integrated Tail Lights for Yamaha YZF-R7 2022+
TST Sequential LED Integrated Tail Lights for Yamaha YZF-R7 2022+
This light gives my 24 R7 a sleek and stealthy look! TST knows how to do it right. They have great bike accessories and even greater customer service. Always quick to answer my questions about this product and treats me well!
Nicholas Choo
Dec 21, 2024
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