517993 Motor sprocket nut
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Specifications
- Brand
- MCS
- Part Number
- 517993
- OEM Reference
- 7991
- Pack Quantity
- Each
- Category
- Motor Sprocket Nuts
- VAT Rate
- 20%
About This Product
This motor sprocket nut is a direct replacement for the original hardware on 1929–1973 45" Sidevalve models, including both Solo bikes and Servi-Cars. It is a crucial fastener for securing the motor sprocket to the crankshaft, ensuring the primary drive remains stable during operation. Manufactured to meet or exceed the original factory specifications, it replaces OEM 7991 and is also referenced as part 517993. For anyone maintaining or restoring a classic Flathead 45, having fresh, high-quality fasteners like this nut is essential for preventing unwanted vibration or loosening in the drive system, keeping your vintage Harley on the road.
Manufacturer part number: 517993.
Fitment
29-73 45" SV
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