901780 Plunger pin front master cyl.
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Specifications
- Brand
- MCS
- Part Number
- 901780
- OEM Reference
- 45031-72
- Pack Quantity
- Pack of 10
- Category
- Master Cylinder Repl Parts
- VAT Rate
- 20%
About This Product
These front master cylinder plunger pins from MCS are essential for the proper engagement of your braking system. They are designed to fit 1972 to 1973 Big Twins and 1973 to 1981 XL Sportsters. Sold as a pack of 10, these pins are perfect for workshop use or for riders who want to keep spares on hand. The plunger pin is a high-wear item that can become corroded or pitted over time, leading to a sticky brake lever or poor master cylinder response. Replacing them with these parts, which correspond to OEM 45031-72, ensures your front brake maintains a crisp, responsive feel during every ride.
Manufacturer part number: 901780.
Fitment
53 models72-73 Big Twin; 73-81 XL Sportster
Cafe Racer 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1977–1978 | Sportster 1000 XLCR-1000 |
Electra Glide 16 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1978 | Electra Glide FLH 80 FLH-80 |
| Harley-Davidson | 1975–1980 | Electra Glide FLH-1200 |
| Harley-Davidson | 1979–1980 | Electra Glide FLH-80 |
| Harley-Davidson | 1975 | Electra Glide FLHF |
| Harley-Davidson | 1977 | Electra Glide FLHS-1200 |
| Harley-Davidson | 1980 | Electra Glide FLHS-80 |
| Harley-Davidson | 1979–1980 | Glide Classic FLHC-80 |
| Harley-Davidson | 1981 | Police Electra Glide FLH-1200 |
| Harley-Davidson | 1981 | Police Electra Glide FLH-80 |
| Harley-Davidson | 1979–1980 | Police FLH-1200 FLH-1200 |
| Harley-Davidson | 1980 | Touring Electra Glide Classic FHL-80 |
| Harley-Davidson | 1979 | Touring Electra Glide Classic FLHC-80 |
| Harley-Davidson | 1980 | Touring Electra Glide FL-80 |
| Harley-Davidson | 1978–1981 | Touring Electra Glide FLH-80 |
| Harley-Davidson | 1977 | Touring Electra Glide Sport FLHS-1200 |
| Harley-Davidson | 1980 | Touring Electra Glide Sport FLHS-80 |
Low Rider 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1977–1979 | FX Super Glide FXS-1200 |
| Harley-Davidson | 1979–1980 | FX Super Glide FXS-80 |
Police 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1975 | Glide Police FL |
Police Electra Glide 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979–1980 | Police FLH 80 FLHP-80 |
Roadster 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979–1980 | Sportster 1000 XLS-1000 |
Softail 5 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1981 | FX Super Glide Fat Bob FXEF |
| Harley-Davidson | 1981 | FX Super Glide FXE |
| Harley-Davidson | 1981 | FX Super Glide FXS |
| Harley-Davidson | 1981 | FX Wide Glide FXWG |
| Harley-Davidson | 1981 | Super Glide B80 FXB |
Sportster 6 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1975–1980 | Sportster 1000 XLCH-1000 |
| Harley-Davidson | 1981 | Sportster 1000 XLH |
| Harley-Davidson | 1979–1980 | Sportster 1000 XLH-1000 |
| Harley-Davidson | 1981 | Sportster Roadster 1000 XLS |
| Harley-Davidson | 1975–1978 | Sportster Standard XLH-1000 |
| Harley-Davidson | 1979 | Sportster XLCH-1000 |
Super Glide 5 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979–1980 | FX Super Glide Fat Bob FXEF-1200 |
| Harley-Davidson | 1979–1980 | FX Super Glide Fat Bob FXEF-80 |
| Harley-Davidson | 1976–1980 | FX Super Glide FXE-1200 |
| Harley-Davidson | 1976–1978 | Super Glide 1200 FX-1200 |
| Harley-Davidson | 1980 | Super Glide B80 FXB-80 |
Tour Glide 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979–1980 | Tour Glide FLT |
| Harley-Davidson | 1980 | Touring Tour Glide FLT |
Touring 9 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1981 | Electra Glide FLH |
| Harley-Davidson | 1981 | Electra Glide FLHS |
| Harley-Davidson | 1981 | Glide Classic FLHC |
| Harley-Davidson | 1981 | Glide Classic FLTC |
| Harley-Davidson | 1981 | Tour Glide FLT |
| Harley-Davidson | 1981 | Touring Electra Glide Classic FLHC |
| Harley-Davidson | 1981 | Touring Electra Glide Sport FLHS |
| Harley-Davidson | 1980–1981 | Touring Tour Glide Classic FLTC |
| Harley-Davidson | 1981 | Touring Tour Glide FLT |
Wide Glide 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1980 | FX Wide Glide FXWG-80 |
XLT Touring 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1977–1980 | Sportster 1000 XLT-1000 |
55CI (883CC) OHV 4 Cycle-Twin 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1980 | Sportster Standard XLH |
74CI (1200CC) OHV Twin 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1978 | Electra Glide FLH |
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