# S&S Cycle 08-17 BT Improved Inner Primary Bearing Race

The tendency of the stock inner primary bearing race on late model big twins to shift on the transmission mainshaft under high torque loads, also known as "walking" of the race, can cause destruction of the transmission mainshaft seal, and ultimately the mainshaft seal, output gear and output gear bearing. The S&S inner primary bearing race features an extra step on the inside diameter that acts as a stop on the transmission mainshaft. When the race is pressed on to the shaft, the step will not allow the race to move inward toward the mainshaft seal. The improved S&S bearing race is a must for any high performance application.

This Part Fits:

Year

Make

Model

Submodel

2008-2021

Harley-Davidson

FLHR Road King

Base

2008-2013

Harley-Davidson

FLHRC Road King Classic

Base

2008-2009,2019-2021

Harley-Davidson

FLHT Electra Glide Standard

Base

2008-2013

Harley-Davidson

FLHTC Electra Glide Classic

Base

2008-2019

Harley-Davidson

FLHTCU Electra Glide Ultra Classic

Base

2009-2013

Harley-Davidson

FLHTCUTG Tri Glide Ultra Classic

Base

2015-2019

Harley-Davidson

FLHTKL Ultra Limited Low

Base

2014-2021

Harley-Davidson

FLHTKSE CVO Limited

Base

2008-2021

Harley-Davidson

FLHX Street Glide

Base

2014-2021

Harley-Davidson

FLHXS Street Glide Special

Base

2010,2015-2021

Harley-Davidson

FLHXSE CVO Street Glide

Base

2010-2011

Harley-Davidson

FLHXXX Street Glide Trike

Base

2012-2017

Harley-Davidson

FLS Softail Slim

Base

2016-2017

Harley-Davidson

FLSS Softail Slim S

Base

2008-2017

Harley-Davidson

FLSTC Heritage Softail Classic

Base

2008-2017

Harley-Davidson

FLSTF Fat Boy

Base

2010-2017

Harley-Davidson

FLSTFB Fat Boy Lo

Base

2016-2017

Harley-Davidson

FLSTFBS Fat Boy S

Base

2008-2011

Harley-Davidson

FLSTSB Cross Bones

Base

2010

Harley-Davidson

FLSTSE CVO Softail Convertible

Base

2008-2010

Harley-Davidson

FXD Dyna Super Glide

Base

2008-2009,2014-2017

Harley-Davidson

FXDL Dyna Low Rider

Base

2008,2010-2017

Harley-Davidson

FXDWG Dyna Wide Glide

Base

2008-2009

Harley-Davidson

FXSTB Night Train

Base

2008-2010

Harley-Davidson

FXSTC Softail Custom

Base

2009

Harley-Davidson

FXSTSSE3 CVO Softail Springer

Base

## Details

- **Price:** 137.19 CAD
- **Vendor:** S&S Cycle
- **Type:** Bearings

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 137.19 CAD | In stock |

## Images

- Photo - Primary
- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-08-17-bt-improved-inner-primary-bearing-race)
> Updated: 2026-07-01