516540 Timer screw, advance unit
Fits: 70-99 Big Twin (Excl. Twin Cam); 71…
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Specifications
- Brand
- MCS
- Part Number
- 516540
- OEM Reference
- 3570T
- Pack Quantity
- Each
- Category
- Advance Units And Parts
- VAT Rate
- 20%
About This Product
This MCS timer screw is a specialized fastener for the advance unit on 1970 to 1999 Big Twin models (excluding Twin Cams) and 1971 to 2003 XL Sportsters equipped with points ignition. It is a direct replacement for OEM 3570T. This small but vital screw holds the advance mechanism in place, ensuring your timing remains consistent across the RPM range. If you are servicing your ignition system or converting back to points, having a fresh, un-stripped screw is essential for a proper setup. It is built to the correct specifications to ensure a secure fit within the timer base, preventing unwanted movement.
Manufacturer part number: 516540.
Fitment
27 models70-99 Big Twin (Excl. Twin Cam); 71-03 XL Sportster(with points ignition)
Cafe Racer 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1977–1978 | Sportster 1000 XLCR-1000 |
Electra Glide 10 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1978 | Electra Glide FLH 80 FLH-80 |
| Harley-Davidson | 1975–1979 | Electra Glide FLH-1200 |
| Harley-Davidson | 1979 | Electra Glide FLH-80 |
| Harley-Davidson | 1975 | Electra Glide FLHF |
| Harley-Davidson | 1977 | Electra Glide FLHS-1200 |
| Harley-Davidson | 1979 | Glide Classic FLHC-80 |
| Harley-Davidson | 1979 | Police FLH-1200 FLH-1200 |
| Harley-Davidson | 1979 | Touring Electra Glide Classic FLHC-80 |
| Harley-Davidson | 1978–1979 | Touring Electra Glide FLH-80 |
| Harley-Davidson | 1977 | Touring Electra Glide Sport FLHS-1200 |
Low Rider 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1977–1979 | FX Super Glide FXS-1200 |
| Harley-Davidson | 1979 | 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 | Police FLH 80 FLHP-80 |
Roadster 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979 | Sportster 1000 XLS-1000 |
Sportster 3 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1975–1978 | Sportster 1000 XLCH-1000 |
| Harley-Davidson | 1979 | Sportster 1000 XLH-1000 |
| Harley-Davidson | 1975–1978 | Sportster Standard XLH-1000 |
Super Glide 4 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979 | FX Super Glide Fat Bob FXEF-1200 |
| Harley-Davidson | 1979 | FX Super Glide Fat Bob FXEF-80 |
| Harley-Davidson | 1976–1979 | FX Super Glide FXE-1200 |
| Harley-Davidson | 1976–1978 | Super Glide 1200 FX-1200 |
Tour Glide 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1979 | Tour Glide FLT |
XLT Touring 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1977 | 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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