Performance Gearing: Driven Racing EVO TECH 428 Front Sprocket
Take control of your Mini-Moto’s power delivery with the Driven Racing EVO TECH Front Sprocket. Engineered using proprietary EST Technology, this is one of the lightest 428-pitch steel sprockets on the market. Whether you're looking for wheelie-popping torque or smoother highway cruising, these sprockets are the gold standard for Honda 125cc builds.
The Driven Racing Advantage
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EVO TECH Weight Reduction: Drilled and machined surfaces remove unnecessary rotating mass for faster throttle response without sacrificing strength.
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Case-Hardened Steel: Manufactured from high-strength chromoly steel for maximum longevity and wear resistance.
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Premium Finish: Features a laser-etched Driven logo and an attractive black-zinc semi-gloss finish to prevent corrosion.
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Made in the USA: Precision-engineered for a perfect fit on the Honda countershaft.
Complete Model Fitment Guide
CRITICAL NOTE: This is a 428-pitch sprocket. It will NOT work with your stock 420 chain. This is intended for 428 chain conversion kits.
| Manufacturer |
Compatible Models |
| Honda |
Grom 125 / MSX125 (2014-2026), Monkey 125 (2019-2026), Super Cub C125, Trail 125 (CT125) |
| Classic Honda |
CT70 (3-Speed), XL80S, XR70R, ZB50 |
| Other |
ZS190 Engine Swaps, Ohvale Mini-GP Bikes |
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Chain Pitch: 428 (Conversion)
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Inner Diameter: 14mm (Peak to Peak) / 17mm (Valley to Valley)
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Mounting: Two M6x1.00 Threaded Holes
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Material: Case-Hardened Chromoly Steel
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SKU: 169-540
Gearing Cheat Sheet:
• 13T (Best Acceleration): Maximum torque for wheelies and short tracks. Top speed limited to ~65mph.
• 14T (Improved Snap): The "sweet spot" for most riders. Better acceleration with minimal top-speed loss.
• 15T (Stock Ratio): Best for big-bore kits or riders looking for lower cruising RPMs.
Note: 1 tooth down on the front is roughly equivalent to adding 3 teeth to the rear sprocket. Orientation matters—install with the laser-etched logo facing outward.
