580281 Diaphragm clutch spring. Heavy Duty
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Specifications
- Brand
- MCS
- Part Number
- 580281
- OEM Reference
- 37971-90
- Pack Quantity
- Each
- Category
- Clutch Springs
- VAT Rate
- 20%
About This Product
For riders looking for a bit more bite from their clutch, this heavy-duty diaphragm clutch spring is an excellent upgrade. Measuring 2.0mm in thickness, it provides increased clamping force over the standard factory spring, making it ideal for high-performance builds or riders who prefer a more positive engagement. It is a custom heavy-duty replacement for the standard OEM 37971-90 spring and is designed to fit 1990 to 1997 Big Twin models. While it may increase the lever pull slightly, the benefit is a clutch that can handle more torque without slipping, ensuring all your power gets to the rear wheel reliably during hard acceleration or heavy cruising.
Manufacturer part number: 580281.
Fitment
36 models90-97 Big Twin
Dyna 8 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1992 | Dyna Daytona FXDB |
| Harley-Davidson | 1993 | Dyna Glide Convertible FXDS-CONV |
| Harley-Davidson | 1993–1997 | Dyna Low Rider FXDL |
| Harley-Davidson | 1991 | Dyna Sturgis FXDB |
| Harley-Davidson | 1995–1996 | Dyna Super Glide Convertible FXDS |
| Harley-Davidson | 1995–1997 | Dyna Super Glide FXD |
| Harley-Davidson | 1993–1997 | Dyna Wide Glide FXDWG |
| Harley-Davidson | 1992 | Super Glide Custom FXDC |
FXR 6 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1990 | FXR Convertible FXRS |
| Harley-Davidson | 1990 | FXR Low Glide FXRS |
| Harley-Davidson | 1990 | FXR Super Glide FXR |
| Harley-Davidson | 1991–1992 | Low Rider Convertible FXRS |
| Harley-Davidson | 1991–1992 | Low Rider FXRS |
| Harley-Davidson | 1991–1994 | Super Glide FXR |
Police 5 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1991–1995 | Electra Glide Standard Police (Fairing) FLHTP |
| Harley-Davidson | 1991–1995 | Electra Glide Standard Police (Windshield) FLHTP |
| Harley-Davidson | 1996 | Electra Glide Standard Police FLHTP |
| Harley-Davidson | 1997 | Electra Glide Standard Police FLHTPI |
| Harley-Davidson | 1996–1997 | Road King Police FLHPI |
Softail 6 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1991–1997 | Fat Boy FLSTF |
| Harley-Davidson | 1993–1996 | Heritage Softail Nostalgia FLSTN |
| Harley-Davidson | 1997 | Heritage Springer FLSTS |
| Harley-Davidson | 1990 | Softail Fat Boy FLSTF |
| Harley-Davidson | 1990 | Softail Heritage FLST |
| Harley-Davidson | 1995–1997 | Springer Softail FXSTSB |
Super Glide 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1997 | Dyna Super Glide Convertible FXDS |
| Harley-Davidson | 1993 | Super Glide Convertible FXRS |
Touring 9 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1996–1997 | Electra Glide Classic FLHTCI |
| Harley-Davidson | 1993–1997 | Road King FLHR |
| Harley-Davidson | 1996–1997 | Road King FLHRI |
| Harley-Davidson | 1991–1995 | Tour Glide Ultra Classic FLTCU |
| Harley-Davidson | 1996 | Tour Glide Ultra Classic FLTCUI |
| Harley-Davidson | 1990 | Touring Tour Glide Classic FLTC |
| Harley-Davidson | 1990 | Touring Tour Glide Classic Ultra FLTCU |
| Harley-Davidson | 1991–1997 | Ultra Classic FLHTCU |
| Harley-Davidson | 1995–1997 | Ultra Classic FLHTCUI |
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