--- product_id: 367828773 title: "Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide" brand: "sthus" price: "605 kr" currency: NOK in_stock: true category: "Sthus" url: https://www.desertcart.no/products/367828773-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide store_origin: NO region: Norway --- # Adjustable chain tightness Spring-loaded precision tension Durable alloy steel build Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide **Brand:** sthus **Price:** 605 kr **Availability:** ✅ In Stock ## Summary > ⚙️ Keep your ride smooth, tight, and unstoppable! ## Quick Answers - **What is this?** Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide by sthus - **How much does it cost?** 605 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/367828773-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide) ## Best For - sthus enthusiasts ## Why This Product - Trusted sthus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Chain Stability:** Spring-loaded design eliminates chain popping and snapping for a seamless ride. - • **Universal Fit for 49cc-80cc:** Compatible with a wide range of motorized bike engines, maximizing versatility. - • **Customizable Tension Control:** Adjust tension to your exact preference, ensuring optimal performance every time. - • **Vibration-Free Riding Experience:** Reduces chain vibration and wear, extending the lifespan of your bike components. - • **Made in the USA with Premium Alloy Steel:** Built tough to withstand rugged use and keep you riding longer. ## Overview The Spring Loaded Chain Tensioner by sthus is a precision-engineered alloy steel component designed for 49cc to 80cc motorized bicycles. Its spring-loaded mechanism maintains optimal chain tension, preventing chain popping and vibration, which enhances ride smoothness and extends the lifespan of your bike’s drivetrain parts. Easy to install and adjustable, this USA-made tensioner is a must-have upgrade for any serious motorized bike enthusiast. ## Description For Chain Tensioner Spring Loaded For 49cc 66cc 80cc Engine Motorized BikePackage Include: 1 x Chain Tensioner KitSpring loaded chain tensioner that keeps chain from popping and snapping. Can be used for all chain drive applications including center mount and rear mount chain drive for gas motorized bicycle plan kits. Must be mounted so that it pulls on the chain so the spring action will work effectively keeping the chain tight, but not too tight.Spring loaded installation positions on bicycle so the spring pulls on the chain. Can also be placed on the lower chain. The amount of tension can be adjusted to your liking. Remove vibration and snapping and popping of the chain during operation. It also keeps the nylon tension wheel from wearing out. This makes for a smoother, more enjoyable ride without vibration and increases the lifespan of not only the chain, but motorized bicycle parts. Makes the whole bike, motor and everything else last longer, because you aren't shaking it excessively. It really makes the difference between enjoying your ride and being glad that it was over. ## Features - For Chain Tensioner Spring Loaded For 49cc 66cc 80cc Engine Motorized Bike - Package Include: 1 x Chain Tensioner Kit - 80cc bike chain tensioner - motorized bike chain tensioner ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07NXX4PV4 | | Brand Name | sthus | | Country of Origin | USA | | Customer Reviews | 4.1 4.1 out of 5 stars (2,446) | | Item Weight | 300 Grams | | Manufacturer | sthus | | Material Type | Alloy Steel | | Model Number | AMWZ_MZ0052-1 | | Part Number | AMWZ_MZ0052-1 | | Recommended Uses For Product | Ensuring proper chain tension in 49cc, 66cc, and 80cc motorized bikes | | Strand Type | Single | | Unit Count | 1.0 Count | ## Product Details - **Brand:** sthus - **Material:** Alloy Steel - **Number of Items:** 1 - **Recommended Uses For Product:** Ensuring proper chain tension in 49cc, 66cc, and 80cc motorized bikes - **Strand Type:** Single ## Images ![Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide - Image 1](https://m.media-amazon.com/images/I/616OeX7TnCL.jpg) ![Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide - Image 2](https://m.media-amazon.com/images/I/71kCiVxZZEL.jpg) ![Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide - Image 3](https://m.media-amazon.com/images/I/71yTr3Q1GnL.jpg) ![Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide - Image 4](https://m.media-amazon.com/images/I/81Q5vsZNxYL.jpg) ![Spring Loaded Chain Tensioner,2 Stroke Motorized Bicycle Chain Guide - Image 5](https://m.media-amazon.com/images/I/81aG33ZWzLL.jpg) ## Questions & Answers **Q: Will this work on a go cart?** A: Depending on the length of the chain an if it will mount to the 2 stroke engine **Q: Replacement wheels come in 8mm&10mm which size do i need for the black Sthus tensioner?** A: That's an odd question. The standard chain for a bike motor kit is #415 which is 7/16" wide or a little more than 11mm; neither of those sizes would work. If it is a replacement wheel then I would propose measuring the one you have to determine how big it is. If the wheel is actually a sprocket then 8mm would work with conventional #415 chain as the inner spacing between the outer bone links of the chain is 8mm. **Q: Can you use the stock chain guard, that comes with the motor, with this tensioner?** A: The stock chain guard and this tensioner can coexist on your bike without issue. **Q: Can these chain tensioners be used to tighten drive belts? I am converting to belt drive .** A: Yes, the pulley is 1" wide, so as long as the belt is not wider than an inch it will work. ## Frequently Bought Together - sthus Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine - JRL 32mm-40mm Black Offset Intake Manifold and Gasket for 49cc 66cc 80cc Motorized Bike Motorised Bicycle (Black) - IMAYCC Bike Motor Kit 80cc Motorized Bike Kit 2 Stroke Bicycle Engine Kit with Wired Digital Computer Fit for 26-28" Bikes --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.no/products/367828773-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide](https://www.desertcart.no/products/367828773-spring-loaded-chain-tensioner-2-stroke-motorized-bicycle-chain-guide) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-30*