Forged Honda 45% Reduction

Ultimate 45% Honda Gear Reduction (not for DCT ATVs with auto mode)

Built for riders who keep asking for something between our 35% and 60% reduction. This set delivers a better top speed than the 60% while still pulling 32s in most conditions — the sweet spot for riders who don't want to give up top end to get there.

This is the same gearing that we raced in the 2026 King of the Deep Honda season! 

• Chromoly forged and heat treated gear set engineered for increased strength and durability
• Billet 6061-T6 CNC-machined anodized hard-coated clutch basket for improved precision and wear resistance
• The tooth profile and gear mesh have been carefully refined to deliver exceptionally quiet operation and efficient power transfer 
• The clutch basket assembly is riveted like OEM Honda ensuring secure and reliable construction
• Custom heavy-duty springs designed to support increased clutch load
• Includes custom crankshaft thrust washer and COG output shaft seal

Fitment:

• Compatible with all Honda Rancher 420 and Foreman 500/520 foot-shift ATVs. Also fits 2015+ Rubicon 500/520 models.
• Fits electric-shift 420/500/520 ATVs and Pioneer 500/520 models, but these applications require a SpeedoDRD for proper shifting.

Important Fitment Note:

• Does NOT fit Rancher or Rubicon models with automatic shift mode, including DCT or FA models.
• This gear reduction replaces OEM part numbers 22100-HP0-A00 and 23120-HP0-A00 to achieve a lower gear ratio. 

Installation Notes:
Professional installation required. We recommend installing new Terache Super-Grip clutch discs with your gear reduction (only use Terache clutches or new OEM). Always remove the OEM crankshaft primary gear washer. 45% reductions include stiffer clutch springs. Always install the Terache primary gear thrust washer onto the crankshaft. Always use motor oil with a JASO-MA rating. Older air-cooled Foreman models require case modifications to fit these gears.