GOOFIT
420-11T Front Engine Sprocket (20mm) for 50cc–125cc Dirt Pit Bike & ATV
420-11T Front Engine Sprocket (20mm) for 50cc–125cc Dirt Pit Bike & ATV
Couldn't load pickup availability
Product Overview
Upgrade your drivetrain with this 420-11T Precision Front Sprocket, engineered for small-displacement engines ranging from 50cc to 125cc. Built from high-strength steel and refined through a rigorous heat-treatment process, this sprocket is designed to survive the high-impact environment of off-road riding. The 11-tooth design offers a versatile balance between acceleration and top speed, ensuring your pit bike or ATV performs reliably on various terrains.
Product Compatibility
| Component Type | Specification |
| Engine Displacement | 50cc, 70cc, 90cc, 110cc, 125cc |
| Vehicle Types | Dirt Pit Bikes, Mini Bikes, ATVs, 4-Wheelers, Mopeds |
| Chain Size | 420 |
| Engine Type | Standard Horizontal & Vertical Engines with 20mm Shafts |
Specifications
| Feature | Details |
| Tooth Count | 11T (11 Teeth) |
| Shaft Diameter | 20mm (0.78") |
| Chain Pitch | 420 |
| Material | Heat-Treated High-Strength Steel |
| Manufacturing | Full CNC Precision Machined |
Key Features
- Advanced Heat Treatment: Subjected to a strict hardening process to significantly improve impact strength and wear resistance, reducing the need for frequent replacements due to tooth rounding.
- Precision CNC Machining: Every tooth is CNC-cut to ensure an exact mesh with the 420 chain. This precision engineering virtually eliminates "chain jump" and significantly reduces operational noise.
- Balanced Performance Profile: The 11-tooth configuration provides a smooth power curve, offering better low-end response than larger sprockets while maintaining a respectable top speed.
- High Stability & Durability: Designed to handle the sudden torque loads of off-road riding, the high-strength steel construction ensures the sprocket remains stable on the output shaft under heavy use.
- Quiet & Smooth Operation: By improving the accuracy of the chain-to-tooth interface, this sprocket enhances the overall smoothness of your drive system, making for a more enjoyable and controlled riding experience.
Share
Fitment FAQ
Will this part fit my specific model and year?
This replacement part is intended for 50cc–125cc Dirt Pit Bike & ATV. It is best matched to original part number(s) 420-11T. Key physical/spec details from the product data include Chain Size: 420, Tooth Count: 11T (11 Teeth), 11T (11 Teeth). Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 420-11T before purchase. For this replacement part, also compare the OEM number, dimensions, connector or mounting style, engine/model year, and product photos.
What models or situations does this part not fit?
Do not order this replacement part for machines outside the listed compatibility, or for units with different OEM numbers, dimensions, mounting points, connectors, or year-specific configurations. If your original part number does not cross-reference with 420-11T, treat the fitment as unconfirmed. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, dimensions, connector or mounting style, engine/model year, and product photos. Confirm OEM/cross-reference number(s): 420-11T. Recheck listed specs such as Chain Size: 420, Tooth Count: 11T (11 Teeth), 11T (11 Teeth). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.