---
product_id: 367828773
title: "Sthus Black Spring loaded chain tensioner for 49cc 66cc 80cc Engine Motorized bike 2 Stroke Engine"
brand: "sthus"
price: "$101"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/367828773-sthus-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc
store_origin: NZ
region: New Zealand
---

# Spring-loaded precision tension Adjustable chain tightness Compatible with 49cc-80cc motorized bikes Sthus Black Spring loaded chain tensioner for 49cc 66cc 80cc Engine Motorized bike 2 Stroke Engine

**Brand:** sthus
**Price:** $101
**Availability:** ✅ In Stock

## Summary

> ⚙️ Keep your ride tight, smooth, and unstoppable!

## Quick Answers

- **What is this?** Sthus Black Spring loaded chain tensioner for 49cc 66cc 80cc Engine Motorized bike 2 Stroke Engine by sthus
- **How much does it cost?** $101 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/367828773-sthus-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc)

## 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

- • **Durability Booster:** Protects your nylon tension wheel and extends the lifespan of your chain and motorized bike parts.
- • **Customizable Ride Comfort:** Easily adjust tension to your preference for a smoother, vibration-free cycling experience.
- • **Effortless Chain Stability:** Spring-loaded design keeps your chain perfectly tensioned, eliminating annoying pops and snaps.
- • **Universal Fit for Motorized Bikes:** Optimized for 49cc, 66cc, and 80cc 2-stroke engines—versatility that keeps you riding.
- • **Made in the USA with Premium Alloy Steel:** Quality craftsmanship ensures long-lasting performance and reliability.

## Overview

The Sthus Black Spring Loaded Chain Tensioner is a precision-engineered alloy steel component designed for 49cc to 80cc motorized bikes. Its spring-loaded mechanism maintains optimal chain tension, preventing chain popping and vibration, while adjustable settings allow for personalized ride comfort. Made in the USA, this durable tensioner protects your drivetrain components, ensuring a longer-lasting, smoother motorized biking experience.

## Description

Sthus Black Spring loaded chain tensioner for 49cc 66cc 80cc Engine Motorized bike 2 Stroke Engine

## 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 |
|---------------|-------|
| Manufacturer | sthus |
| Brand | sthus |
| Package Dimensions | 11.2 x 9.91 x 5.21 cm; 300 g |
| Item model number | AMWZ_MZ0052-1 |
| Manufacturer Part Number | AMWZ_MZ0052-1 |
| Material | Alloy Steel |
| Colour | Black |
| Manufacturer | sthus |
| Country of Origin | USA |
| Item Weight | 300 g |

## Product Details

- **Brand:** sthus
- **Material:** Alloy Steel
- **Recommended Uses For Product:** Ensuring proper chain tension in 49cc, 66cc, and 80cc motorized bikes

## Images

![Sthus 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.nz/products/367828773-sthus-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc](https://www.desertcart.nz/products/367828773-sthus-black-spring-loaded-chain-tensioner-for-49cc-66cc-80cc)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-07*