Feature: 1. BROAD COMPATIBILITY: This semi automatic clutch assembly is widely applicable to 50cc, 110cc, 125cc ATVs, off road bikes, Go Kart, providing reliable and durable performance. 2. ENHANCED TRANSMISSION: With a 17 tooth design, this clutch assembly provides excellent driving performance, delivering a smoother and more efficient driving experience. 3. DURABLE MATERIALS: Crafted from wear resistant, strong, and stable metal materials, this clutch assembly ensures a longer lifespan and outstanding durability for prolonged use. 4. RELIABLE PERFORMANCE: The 4‑1/2 inch diameter and metal construction of this clutch kit guarantee reliable performance for your engine dirt bikes and ATV. 5. EASY INSTALLATION: Designed for easy and simple installation, offering superior driving power and efficiency for your semi automatic engine, saving you much hassle. Specification: Item Type: Clutch Assembly Material: Metal Clutch Diameter: 4-1/2in Drive Gear: 17 Teeth Fitment: For Semi Auto 50cc-125cc Engine Dirt Bikes ATV Go Kart, for Taotao. Package List: 1 x Set of Clutch Assembly (18PCS)