Racing 6-Speed Gearbox – Derbi 50cc
High performance – Special steel – Polished tribofinish
Product Description
Designed for Derbi Euro 2 / Euro 3 engines, this 6-speed racing gearbox is made for demanding riders and top-tier engine setups.
Machined from high-grade steel for exceptional high-rev durability, it features a polished tribofinish to reduce internal friction, improve gear engagement and extend the life of all components.
Technical Specifications
- Compatibility: Derbi Euro 2 / Euro 3 (D50B0 / EBE / EBS engines)
- Gears: 6-speed
1st: 12 x 32 (37.5%)
2nd: 16 x 30 (53.5%)
3rd: 18 x 27 (66.5%)
4th: 20 x 24 (80%)
5th: 22 x 24 (92%)
6th: 22 x 22 (100%)
- High-strength special steel, heat treated
- Precision CNC-cut gears
- Polished tribofinish (mirror effect) for friction reduction
- Optimized gear mesh alignment
- Reinforced primary and secondary shafts
- Micrometric manufacturing tolerances
Product Advantages
- Reduced internal friction
- Smooth gear engagement
- Lower heat and wear
- Enhanced throttle response for racing
- Superior durability under high-stress use
- Ideal for setups making 15–22+ hp
Kit Contents
- 1 complete primary shaft (6 gears)
- 1 complete secondary shaft
- 12 CNC-cut and polished gears
- Spacers, shims, and thrust washers
- Setup and calibration guide included
Installation & Tips
- Perform a dry fit and check lateral shimming
- Use high-performance gear oil (75W90 or racing equivalent)
- Compatible with OEM or reinforced clutch packs
- Recommended: C4 gearbox bearings for added reliability
Ideal for:
- 50–80cc racing builds
- Karting, Supermotard, high-performance mopeds
- High-rev engines (>16500 RPM)
- Racers seeking performance and reliability
