## Moto-Master Steel Rear Sprocket 428 40 Teeth, 620291 This Moto-Master Steel Rear Sprocket 428 with 40 teeth (part number 620291) is engineered to deliver exceptional durability and performance for KTM, GasGas, and Husqvarna 50cc youth motocross bikes. Crafted from high-grade hardened steel, this essential component ensures reliable power transfer and withstands the rigors of competitive off-road riding, providing young riders with the confidence they need. It's an ideal choice for riders seeking a long-lasting, high-quality replacement or upgrade for their 50cc machine. ### Unmatched Durability for Youth Motocross The Moto-Master Steel Rear Sprocket is specifically designed to endure the demanding conditions of youth motocross tracks. Its robust construction ensures maximum resistance to wear and tear, providing consistent and reliable power delivery throughout intense rides. This focus on strength means less frequent replacements and more time riding, a crucial factor for young riders pushing their limits. * Constructed from premium hardened steel for superior longevity. * Engineered to withstand the high stress of competitive 50cc motocross. * Optimized tooth profile ensures efficient power transmission and reduces chain wear. ### Precision Engineering for Consistent Performance Every Moto-Master Steel Rear Sprocket is a testament to precision engineering, ensuring a perfect fit and seamless integration with your bike's drivetrain. This meticulous design minimizes friction and maximizes efficiency, contributing to a smoother ride and better control, which is crucial for developing young riders. The Moto-Master brand signifies unwavering reliability and superior craftsmanship. * Designed for chain type 428 with exactly 40 teeth for optimal gearing. * Specifically tailored for KTM, GasGas, and Husqvarna 50cc models. * Guarantees reliable operation even under the most challenging racing conditions. ### Technical Specifications * Product Type: Rear Sprocket * Series: Steel Rear Sprocket * Chain Type: 428 * Teeth Count: 40 * Material: Hardened Steel * Part Number: 620291 ### Compatibility * KTM SX 50 (2014-2026) * KTM SX 50 Mini (2014-2026) * KTM SX-E 5 E-Bike (2019-2026) * GASGAS MC 50 MC-E E-Bike (2021-2026) * HUSQVARNA TC 50 (2017-2026) * HUSQVARNA TC 50 Mini (2018-2026) * HUSQVARNA EE 5 E-Bike (2019-2026)