The Ultimate Honda DCT Gear Reduction is built for riders who need a serious gearing upgrade for larger tires, deep mud, and demanding off-road conditions.
- All-new billet forged assembly with zero reused parts
- Ultra-smooth tooth profile and gear mesh for quiet operation and efficient torque transfer
- Chromoly Forged and heat-treated gear set for increased strength and long-term performance
- Retains the factory damping while upgrading to a precision billet aluminum hub assembly
- Riveted hub assembly, just like OEM
Fitment:
Fits 2009+ Honda 420, 500, and 520 DCT automatic ATV models.
Important Fitment Note:
Professional installation is required. Installation requires clearancing of the transmission clutch cover spacer to fit the larger gear. This can be completed by removing the spacer assembly and carefully clearancing it with a burr. Some models may require recalibrating the speed sensors. We do not recommend using auto shift mode with this gear reduction. This kit replaces OEM part numbers: 23120-HP7-A00, 90457-HN2-000, and 23100-HP7-A00 to achieve a lower gear ratio at the primary engine reduction.






