Engineered for serious riders looking to push their electric dirt bike to the limit, this high-performance 520 primary drive conversion kit delivers unmatched power transfer and reduced rotational mass. Proven on championship-winning EBMX FIM E-Xplorer race bikes, it’s the go-to choice for competitive riders like Jack Field and Jess Gardiner.
Key Features
- Patented dished sprocket design ensures optimal chain clearance
- Premium 520 non-sealed Japanese chain minimizes rotational resistance
- Ultra-light 7075-T6 billet aluminum rear sprocket with hard anodized coating
- Precision-machined steel countersunk front sprocket with heat treatment
- Convenient master link system for quick maintenance and chain replacement
Technical Specifications
| Parameter | Value |
|---|---|
| Chain Type | 520 non-O-ring (Fire Power Japan) |
| Rear Sprocket Material | 7075-T6 billet aluminum |
| Front Sprocket Material | Heat-treated machined steel |
| Weight Reduction | Counter-cut design |
| Compatibility | Sur Ron Ultra Bee OEM & EBMX V1/V2 XUB-80 motors |
Performance Advantages
Unlike rubber-damped kits that sacrifice efficiency, this direct-drive system maximizes power transfer while minimizing chain wear. The open design prevents debris buildup that plagues conventional setups, making it ideal for aggressive trail riding and competitive racing conditions.
Ideal For
- Competitive e-motocross racers needing every watt of power transfer
- Technical trail riders who demand reliable performance in muddy conditions
- Performance enthusiasts upgrading their Sur Ron Ultra Bee for track days
Note: Some aftermarket motors may require shims for proper alignment. Always verify chain alignment before riding. Detailed installation guide available here.
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