# BAK-400HDB-AM - 1.25" TO 1.375" BEARING & AXLE UPGRADE - ESSENTIAL KIT (2010-2016)

BAK-400HDB-AM - 1.25" TO 1.375" BEARING & AXLE UPGRADE - ESSENTIAL KIT (2010-2016) - ARGO PARTS  
  
**AFTERMARKET PREMIUM OUTER BEARING**  
**ARGO OEM INNER BEARINGS, AXLES, CORK GASKETS, AND BASIC HARDWARE  
  
**Looking to upgrade your HD 700 or HDI 750 models axles and bearings from the smaller 1.25" ID size to the 1.375" ID that was released in 2017 which offers improved durability and axle strength?  
  
This essentials kit includes the minimum parts needed to change out your axles, bearings, and sprockets.  You would reuse your outer flanges, bearing seats, and nuts and bolts.  If you want all new flanges, bearing seats, and new hardware order kit BAK-401-AM. Your chains will remain the same part numbers, however if you need a new chain kit order part Ck-103.  
  
**This kit fits all 2010 - 2017 8x8 HD 700, HDI 750, and HDI SE 8x8 models.  If your 2016 HDI has aluminum rims stock from the factory, you already have 1.375" axles.  
  
  
**The Essential 1.375" Upgrade Kit includes:  
  
(4)  810-122  F/R Axles  
(4)  810-123  Mid Axles  
(4)  805-142 Sprocket, D50x25T-16/32 INT  
(8)  805-143 Sprocket, S60x19T-16/32 INT  
(6)  106-15-025  Retaining Ring  
(6) 10040J  E-Clip  
(16)  606-90 Cork Gasket  
(8)  101-123AM  (AFTERMARKET) 1.375"x72mm Premium Aftermarket Bearing  
(8)  200-0184-001  (ARGO OEM) 1"x62mm Inner Bearing  
(8)  200-0005-010  High Carbon Washer  
(8)  10041J  Axle Bolt

## Details

- **Price:** 3835.62 USD
- **Vendor:** Doc's Full Bore Outdoor
- **Tags:** 1.375" Upgrade, Argo Parts, Freight, OEM Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3835.62 USD | In stock |

## Images

- A complete mechanical parts kit laid out on a white background, including black sprockets, dark metal shafts with splined ends, small silver and gold hardware, washers, clips, and gaskets. BAK-400HDB-AM Argo parts
- RBI AFTERMARKET ARGO BEARING PROMOTION
- Argo Genuine Parts and Accessories

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> Source: [Doc's Full Bore Outdoor](https://parts.docsfullboreoutdoor.com/products/bak-400hdb-am-1-25-to-1-375-bearing-axle-upgrade-essential-kit-2010-2016)
> Updated: 2026-07-27