- Home Page /
- Automotive /
- Motorcycle Parts /
- Parts /
- Drive Train /
- Chains & Sprockets /
- Chain Adjusters /
- Chain Tensioner w/ Spring for Razor MX350, MX...
0 ratings
Item #:
57931828
Chain Tensioner w/ Spring for Razor MX350, MX400 Dirt Rocket RSF350
76% of respondents would recommend this to a friend
Item #:
57931828
BSD 21
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
19%
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Saturday, September 19
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
Keep your MX350 and MX400 electric Dirt Rockets running like new with our replacement Silver Chain Tensioner!
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
What Stands Out
Complete Replacement Kit
Includes a spring, roller adjuster, and necessary hardware for a comprehensive replacement solution, ensuring your Razor bike maintains optimal performance.
Durable Construction
Built with high-quality materials to withstand the rigors of off-road riding, providing enhanced longevity and reliability over competing tensioners.
Easy Installation
Designed for quick and hassle-free installation, allowing riders to replace the tensioner with minimal tools, saving time and ensuring a smooth ride.
Product Details
Product Technical Details
| Item Package Dimensions L x W x H | 3.5 x 1.25 x 1 inches |
| Package Weight | 0.05 kg |
| Item Dimensions LxWxH | 4 x 6 x 1 inches |
| Brand Name | AlveyTech |
| Number of Items | 1 |
| Manufacturer | AlveyTech |
| Part Number | W75-8273 |
Who Should Buy?
-
Dirt Bike Enthusiasts
Ideal for riders who need reliable chain tension adjustments for improved performance and safety on dirt tracks.
-
Razor Owners
Specifically designed for Razor MX350, MX400, and RSF350 models, ensuring a perfect fit and easy installation.
-
Maintenance Hobbyists
Great for DIY maintenance lovers who enjoy repairing and upgrading their bikes with quality components.
-
Casual Riders
Not suitable for occasional riders who may not require advanced chain tensioning capabilities or equipment.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
Is this chain tensioner compatible with the RSF350 Sports E-Bike?
Answer: Yes, the AlveyTech Silver Chain Tensioner is compatible with the RSF350 Sports E-Bike. -
Question:
What tools are needed for installation?
Answer: Minimal tools are needed for installation of the Silver Chain Tensioner. -
Question:
Does the chain tensioner come with all necessary hardware?
Answer: Yes, the Silver Chain Tensioner comes with all necessary hardware, including springs, M6 x 1.0 threaded bolts, and nuts. -
Question:
What is the inner width of the pulley (mm if possible)?
Answer: Look up Razor chain spec. -
Question:
Will this work with a #35 chain?
Answer: Works with Razor chain. -
Question:
Is the pulley metal or plastic?
Answer: Metal. -
Question:
Will this work with a 420 chain?
Answer: Works with Razor chain.
AlveyTech Chain Adjusters Editorial Review
The AlveyTech Silver Chain Tensioner has received a generally positive reception from customers looking for reliable solutions for their dirt bikes and scooters. Users have found that this product effectively handles substantial torque demands, particularly when powering modified electric mini bikes like the Razor MX350 and MX400. One customer highlighted the impressive performance of the tensioner under extreme conditions, indicating that it mitigated issues faced with the stock tensioner at high speeds. Another review noted its satisfactory fitment in go-karts, and a parent appreciated the tensioner for their child's electric scooter, commending it for both quality and price. Customers enjoyed the ease of installation, with one reviewer reporting a quick fix in just five minutes. However, there were some concerns regarding the size of the roller—specifically for the use with a 420 chain—leading some to take additional measures to ensure compatibility. Despite a notable issue where a wheel crumbled after minimal use, the overall Consensus remains favorable, with many users appreciating the value it provides for upgrading and maintaining their electric rides. **
Customer Reviews & Ratings
105 customers ratings
-
5 Star
59%
-
4 Star
14%
-
3 Star
11%
-
2 Star
5%
-
1 Star
11%
Review this product
Share your thoughts with other customers
Pros
- Strong performance handling high torque
- Suitable for modified electric mini bikes
- Quick and easy installation
- Good quality for the price
Cons
- Roller size may be small for some chains, requiring modifications
Platform Trust & Buyer Confidence
JG
Jazz
Verified buyer
“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
EK
Emmanuel
Verified buyer
“I always receive support when I engage customer service. Overall my experience with UBUY has been top notch. Keep up the good work.”
31 August 2026 · via Trustpilot
F
fnd
Verified buyer
“The delivery was fast and the product came undamaged and authentic.”
29 August 2026 · via Trustpilot
LC
Leana
Verified buyer
“Ubuy is extremely efficient and to order online is an easy process. The verity of products to buy is really unlimited! My order was urgent and I got it on time. The products are great! Thank you Ubuy!”
25 August 2026 · via Trustpilot
HL
Hengo
Verified buyer
“Fast, convenient and cheap. Great store!”
27 August 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.
BSD 21
Order now and get it around Saturday, September 19
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
- Replacement Silver Chain Tensioner for Razor MX350 and MX400 Dirt Bike Rockets
- Ensures a smooth ride for you and your loved ones
- Made from high quality materials
- Easy DIY installation
- Compatible with all versions of Razor MX350 and MX400 Dirt Bike Rockets
- Includes extra spring for added value
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.