The 35% Honda Gear Reduction is designed for riders who need lower gearing for larger tires, deep mud, technical trails, and demanding off-road use. By replacing the OEM primary gear components, this reduction delivers a lower gear ratio that helps improve low-end torque, throttle control, and overall drivability in tough conditions.
This gear reduction replaces OEM part numbers 22100-HP0-A00 and 23120-HP0-A00.
Fitment:
Compatible with Honda Rancher 420 and Honda Foreman 500/520 models. Also fits 2015+ Honda Rubicon 500/520, electric shift ATVs, and Honda Pioneer 500/520 models.
Important Fitment Note:
Electric shift ATVs and Pioneer 500/520 models require a SpeedoDRD for proper shifting.
Does Not Fit:
Does not fit Rancher or Rubicon models with automatic shift mode, including DCT or FA models.
Installation Notes:
Professional installation required. We recommend installing new Terache Super-Grip clutch discs with your gear reduction. Always remove the OEM crankshaft primary gear washer. Always install the Terache primary gear thrust washer onto the crankshaft. Always use motor oil with a JASO-MA rating.







