970811 MCS Steel breather valve. std for Harley-Davidson
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Specifications
- Brand
- MCS
- Part Number
- 970811
- OEM Reference
- 25310-71A
- Pack Quantity
- Each
- Category
- Breather Valves
- VAT Rate
- 20%
About This Product
MCS standard steel breather valve for 1948 to early 1977 Big Twin models. Fits Panheads and early Shovelheads. Replaces OEM 25310-71A and 970811. The valve manages internal engine pressure and makes oil return to the tank. A worn unit causes oil carryover and breathing out of the air cleaner. Replace it during top-end or bottom-end service to keep the motor dry.
Manufacturer part number: 970811.
Fitment
24 models48-E77 Big Twin
FL Shovel 7 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1970–1974 | Electra Glide FL-1200 |
| Harley-Davidson | 1966–1968 | Electra Glide FLB-1200 |
| Harley-Davidson | 1970–1977 | Electra Glide FLH-1200 |
| Harley-Davidson | 1967–1969 | Electra Glide FLHB-1200 |
| Harley-Davidson | 1975 | Electra Glide FLHF |
| Harley-Davidson | 1971–1975 | Electra Glide FLHF-1200 |
| Harley-Davidson | 1975 | Glide Police FL |
Flathead 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1948 | Flathead UH-1300 |
FX Shovel 4 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1976–1977 | FX Super Glide FXE-1200 |
| Harley-Davidson | 1976–1977 | Super Glide 1200 FX-1200 |
| Harley-Davidson | 1973–1975 | Super Glide FX-1200 |
| Harley-Davidson | 1973–1975 | Super Glide FXE-1200 |
Knucklehead 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1948 | Knucklehead EL-1000 |
Panhead 11 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1958–1964 | Duo Glide FL-1200 |
| Harley-Davidson | 1959–1963 | Duo Glide FLH-1200 |
| Harley-Davidson | 1959 | Duo Glide FLHF-1200 |
| Harley-Davidson | 1965 | Electra Glide FLFB-1200 |
| Harley-Davidson | 1949–1952 | Hydra Glide E-1000 |
| Harley-Davidson | 1950 | Hydra Glide EL-1000 |
| Harley-Davidson | 1949–1952 | Hydra Glide F-1200 |
| Harley-Davidson | 1950–1957 | Hydra Glide FL-1200 |
| Harley-Davidson | 1953–1954 | Hydra Glide FLE-1200 |
| Harley-Davidson | 1953 | Hydra Glide FLEF-1200 |
| Harley-Davidson | 1948 | Panhead F-1200 |
Planning other changes? Find your model in the bike customiser.
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Who are we? Leeds Harley-Davidson - Iron City Motorcycles
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