Hastings 3.188" Bore Standard Piston Ring Set (7003)
- Includes top compression rings, second compression rings, and oil control rings.
Top Compression Ring is Torsional.
- Increases gas side sealing and better oil control.
- May have barrel or straight face.
Second Compression Ring is Torsional.
- This twist ring creates an OD bottom side scraping edge that helps wipe oil off the cylinder wall and into the crankcase.
- Sharp edge contact helps speed break-in.
Oil Control Rings are Three Piece Flex Vent.
- Three-piece design allows rails to be manufactured with a small cross sectional area for better conformability to bore.
- Provides uniform pressure through four steel rails and two expanders assuring positive oil control.
- Made in the USA.
- Includes enough rings for two pistons.
- Two rings per groove, except for the rails that will be two rail rings per one expander ring.
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1978-1985 | Harley-Davidson | Roadster XLS | |
| 1977-1978 | Harley-Davidson | Sportster 1000 Cafe Racer XLCR | |
| 1977-1978 | Harley-Davidson | Sportster 1000 Touring XLT | |
| 1972-1979 | Harley-Davidson | Sportster 1000 XLCH | |
| 1972-1985 | Harley-Davidson | Sportster 1000 XLH | |
| 1984-1985 | Harley-Davidson | XLX 61 | |
| 1983-1985 | Harley-Davidson | XR1000 | |
| 1974-1975 | Harley-Davidson | XR750 | |