31321-80 Transmission Gasket & Seals for 4 Speed Big Twin 1936-1986
incl. VAT
Chapter members save 15% · Sign in for member pricing
Usually dispatched within 3 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- Athena
- Part Number
- 700485
- OEM Reference
- 31321-80
- Pack Quantity
- Each
- Category
- Transmission Gaskets
- VAT Rate
- 20%
About This Product
Servicing a classic 4-speed Big Twin requires quality components to handle the demands of vintage machinery. This transmission gasket and seal set is designed for Big Twin, FX, and Touring models from 1936–1986. It is sold as a set and contains all the gaskets, seals, and O-rings required to properly service your gearbox and prevent unwanted oil leaks. Replacing OEM 31321-80, this kit is an essential part of any transmission maintenance or rebuild project. By using a complete set, you ensure that every mating surface and shaft exit is properly sealed, maintaining the integrity of your classic Harley's drivetrain for years to come.
Fitment
37 modelsBig Twin | FX | Touring
Fxr 8 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1984 | DISC GLIDE FXRDG |
| Harley-Davidson | 1986 | EJLG FXR Custom (1986) EJLG FXRC FXR Custom (1986) FXR Custom FXRC EJLG |
| Harley-Davidson | 1982–1986 | LOW RIDER FXRS |
| Harley-Davidson | 1985 | LOW RIDER CHROME FXRC |
| Harley-Davidson | 1985–1986 | LOW RIDER SPORT EDITION FXRS-SP |
| Harley-Davidson | 1983–1986 | SPORT GLIDE FXRT |
| Harley-Davidson | 1982–1986 | SUPER GLIDE FXR |
| Harley-Davidson | 1986 | SUPER GLIDE DELUXE FXRD |
Softail 10 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1981–1982 | BLACKLINE FXS |
| Harley-Davidson | 1983–1985 | BREAKOUT FXSB |
| Harley-Davidson | 1986 | HERITAGE SOFTAIL FLST |
| Harley-Davidson | 1986 | SOFTAIL CUSTOM FXSTC |
| Harley-Davidson | 1984–1986 | SOFTAIL STANDARD FXST |
| Harley-Davidson | 1981–1984 | SUPER GLIDE FXE |
| Harley-Davidson | 1981–1982 | SUPER GLIDE FXB |
| Harley-Davidson | 1981–1985 | SUPER GLIDE FXEF |
| Harley-Davidson | 1983 | SUPER GLIDE FXDG |
| Harley-Davidson | 1981–1986 | WIDE GLIDE FXWG |
Touring 19 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1984 | Classic Tour Glide Classic (1984) Tour Glide Classic FLT Classic |
| Harley-Davidson | 1984 | Electra Glide (1984) Electra Glide FLHT |
| Harley-Davidson | 1983–1986 | ELECTRA GLIDE CLASSIC FLHTC |
| Harley-Davidson | 1985–1986 | ELECTRA GLIDE CLASSIC SHRINE FLHTC SHRINE |
| Harley-Davidson | 1981–1982 | ELECTRA GLIDE CLASSIC WITH SIDECAR FLHC WITH SIDECAR |
| Harley-Davidson | 1983–1986 | ELECTRA GLIDE CLASSIC WITH SIDECAR FLHTC WITH SIDECAR |
| Harley-Davidson | 1984 | ELECTRA GLIDE SPECIAL WITH SIDECAR FLHX WITH SIDECAR |
| Harley-Davidson | 1981–1984 | ELECTRA GLIDE SPORT FLHS |
| Harley-Davidson | 1981–1984 | ELECTRA GLIDE STANDARD SHRINE FLH SHRINE |
| Harley-Davidson | 1981–1982 | HERITAGE FLH-HERITAGE |
| Harley-Davidson | 1981–1982 | Heritage Classic FLHC |
| Harley-Davidson | 1981–1985 | Street Glide® FLHX |
| Harley-Davidson | 1981–1986 | TOUR GLIDE FLT |
| Harley-Davidson | 1980–1986 | TOUR GLIDE CLASSIC FLTC |
| Harley-Davidson | 1986 | TOUR GLIDE CLASSIC SHRINE FLTC SHRINE |
| Harley-Davidson | 1984–1986 | TOUR GLIDE CLASSIC WITH SIDECAR FLTC WITH SIDECAR |
| Harley-Davidson | 1983 | TOUR GLIDE WITH SIDECAR FLT WITH SIDECAR |
| Harley-Davidson | 1983–1986 | TOURING ELECTRA GLIDE STANDARD FLHT |
| Harley-Davidson | 1981–1985 | TOURING REVIVAL FLH |
Related Products
View all →
More from Athena
View all →
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.