--- product_id: 267964920 title: "Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine" brand: "sthus" price: "MX$1368" currency: MXN in_stock: true category: "Sthus" url: https://www.desertcart.mx/products/267964920-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc-engine store_origin: MX region: Mexico --- # Adjustable tension for smooth ride Spring-loaded precision tension Fits 49cc-80cc motorized bikes Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine **Brand:** sthus **Price:** MX$1368 **Availability:** ✅ In Stock ## Summary > ⚡ Keep your ride tight, smooth, and unstoppable! ## Quick Answers - **What is this?** Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine by sthus - **How much does it cost?** MX$1368 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/267964920-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc-engine) ## 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 - • **Unmatched Chain Stability:** Spring-loaded design eliminates chain popping and snapping for a worry-free ride. - • **Customizable Tension Control:** Easily adjust tension to your preferred tightness, ensuring optimal performance. - • **Durability Meets Performance:** Protects the nylon tension wheel and extends the lifespan of your chain and bike parts. - • **Vibration-Free Riding Experience:** Reduces vibration and wear, transforming every ride into a smooth, enjoyable journey. - • **Universal Fit for 49cc to 80cc Engines:** Perfectly engineered to support a wide range of motorized bike engines. ## Overview This black spring-loaded chain tensioner is designed for motorized bikes with 49cc, 66cc, and 80cc 2-stroke engines. It prevents chain popping and snapping by maintaining optimal tension through an adjustable spring mechanism. Made from durable metal, it reduces vibration, protects the nylon tension wheel, and extends the lifespan of your bike’s drivetrain components, ensuring a smoother and more reliable ride. ## Description sthus Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine : desertcart.co.uk: Business, Industry & Science ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07NXX4PV4 | | Best Sellers Rank | 169,382 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 128 in Industrial Drive Belt & Chain Tensioners | | Brand | sthus | | Customer Reviews | 4.1 out of 5 stars 2,445 Reviews | | Item Length | 45 Inches | | Item Weight | 300 Grams | | Item length | 45 Inches | | Load Capacity | 2.5E+2 bis 500 N | | Load capacity | 2.5E+2 bis 500 N | | Manufacturer | sthus | | Manufacturer Part Number | AMWZ_MZ0052-1 | | Material | Metal | | Model Number | AMWZ_MZ0052-1 | | Recommended Uses For Product | Maintaining proper chain tension in motorized bikes with 49cc, 66cc, and 80cc engines | | Recommended uses for product | Maintaining proper chain tension in motorized bikes with 49cc, 66cc, and 80cc engines | | Strand Type | Multiple | | Strand type | Multiple | | Unit Count | 1.0 count | ## Product Details - **Brand:** sthus - **Item length:** 45 Inches - **Load capacity:** 2.5E+2 bis 500 N - **Material:** Metal - **Recommended uses for product:** Maintaining proper chain tension in motorized bikes with 49cc, 66cc, and 80cc engines ## Images ![Black Spring Loaded Chain Tensioner For 49cc 66cc 80cc Engine Motorized Bike 2 Stroke Engine - Image 1](https://m.media-amazon.com/images/I/616OeX7TnCL.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.mx/products/267964920-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc-engine](https://www.desertcart.mx/products/267964920-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc-engine) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-09-03*