S&S CYCLE 84" Stock Bore Stroker Kit — 4-1/2" stroke – 70-84 Big Twin, 79-83 Touring, 82-84 FXR, 84 Police
In stock items will be shipped within 1-3 days.
You can return the products within 14 days for a full refund, check our returns policy.
In stock items will be shipped within 1-3 days.
You can return the products within 14 days for a full refund, check our returns policy.
The 84" Stock Bore Stroker Kit brings increased displacement and a thicker midrange to compatible Shovelhead engines, giving a noticeable boost to throttle response and torque. 🔧🔥
This complete stroker flywheel kit includes a dynamically balanced flywheel assembly paired with heavy-duty connecting rods and reinforced mainshafts for reliable power delivery. It is engineered to reuse the stock cylinders, saving cost while retaining the engine's stock appearance. 🛠️
Minor crankcase and cylinder modifications are required and can be completed with common hand tools. Special pistons are required for installation and must be ordered separately—contact S&S for piston options and fitment guidance.
We ship to:
We do not ship to the Canary Islands, Ceuta, or Melilla.
Shipping costs are calculated automatically at checkout based on destination and weight.
Free shipping may be offered for qualifying orders, as specified on our website.
Orders are processed within 1–2 business days after payment confirmation. Orders placed on weekends or public holidays are processed the next business day.
If your order is delayed or arrives damaged, you must notify us within 14 calendar days. We will investigate the issue and offer a resolution in accordance with applicable consumer protection laws.
In accordance with Royal Legislative Decree 1/2007 (Ley de Defensa de los Consumidores y Usuarios), you have the right to withdraw from your purchase within 14 calendar days from the date of receipt, without giving any reason.
To exercise this right, contact us via email or through our website, providing your order number and contact details.
If you want to return an item, please contact us first to give you detailed instructions.
This product fits the following vehicles. Use the filters below to narrow down the list if needed.
| Manufacturer | Model | Family | Year | Notes |
|---|---|---|---|---|
| Harley Davidson | Electra Glide | Big Twin | 1970 | |
| Harley Davidson | Electra Glide | Big Twin | 1971 | |
| Harley Davidson | Electra Glide | Big Twin | 1972 | |
| Harley Davidson | Electra Glide | Big Twin | 1973 | |
| Harley Davidson | Electra Glide | Big Twin | 1974 | |
| Harley Davidson | Electra Glide | Big Twin | 1975 | |
| Harley Davidson | Electra Glide | Big Twin | 1976 | |
| Harley Davidson | Electra Glide | Big Twin | 1977 | |
| Harley Davidson | Electra Glide | Big Twin | 1970 | |
| Harley Davidson | Electra Glide | Big Twin | 1971 | |
| Harley Davidson | Electra Glide | Big Twin | 1972 | |
| Harley Davidson | Electra Glide | Big Twin | 1973 | |
| Harley Davidson | Electra Glide | Big Twin | 1974 | |
| Harley Davidson | Electra Glide | Big Twin | 1975 | |
| Harley Davidson | Electra Glide | Big Twin | 1976 | |
| Harley Davidson | Electra Glide | Big Twin | 1977 | |
| Harley Davidson | Electra Glide | Big Twin | 1978 | |
| Harley Davidson | Electra Glide | Big Twin | 1979 | |
| Harley Davidson | Electra Glide | Big Twin | 1980 | |
| Harley Davidson | Electra Glide | Big Twin | 1979 | |
| Harley Davidson | Electra Glide | Big Twin | 1980 | |
| Harley Davidson | Electra Glide | Big Twin | 1981 | |
| Harley Davidson | Electra Glide | Big Twin | 1982 | |
| Harley Davidson | Electra Glide | Big Twin | 1983 | |
| Harley Davidson | Electra Glide Belt Drive | Big Twin | 1984 | |
| Harley Davidson | Electra Glide Classic | Big Twin | 1979 | |
| Harley Davidson | Electra Glide | Big Twin | 1980 | |
| Harley Davidson | Electra Glide Classic | Big Twin | 1981 | |
| Harley Davidson | Electra Glide Classic | Big Twin | 1982 | |
| Harley Davidson | Electra Glide Classic | Big Twin | 1983 | |
| Harley Davidson | Electra Glide Sport | Touring | 1979 | |
| Harley Davidson | Electra Glide Sport | Touring | 1980 | |
| Harley Davidson | Electra Glide | Touring | 1983 | |
| Harley Davidson | Tour Glide | Touring | 1980 | |
| Harley Davidson | Tour Glide | Touring | 1981 | |
| Harley Davidson | Tour Glide | Touring | 1982 | |
| Harley Davidson | Tour Glide | Touring | 1983 | |
| Harley Davidson | Tour Glide Classic | Touring | 1980 | |
| Harley Davidson | Tour Glide Classic | Touring | 1981 | |
| Harley Davidson | Tour Glide Classic | Touring | 1982 | |
| Harley Davidson | Tour Glide Classic | Touring | 1983 | |
| Harley Davidson | Super Glide | Big Twin | 1971 | |
| Harley Davidson | Super Glide | Big Twin | 1972 | |
| Harley Davidson | Super Glide | Big Twin | 1973 | |
| Harley Davidson | Super Glide | Big Twin | 1974 | |
| Harley Davidson | Super Glide | Big Twin | 1975 | |
| Harley Davidson | Super Glide | Big Twin | 1976 | |
| Harley Davidson | Super Glide | Big Twin | 1977 | |
| Harley Davidson | Super Glide | Big Twin | 1978 | |
| Harley Davidson | Super Glide | Big Twin | 1979 | |
| Harley Davidson | Sturgis | Big Twin | 1980 | |
| Harley Davidson | Sturgis | Big Twin | 1981 | |
| Harley Davidson | Sturgis | Big Twin | 1982 | |
| Harley Davidson | Big Twin | 1983 | ||
| Harley Davidson | Big Twin | 1984 | ||
| Harley Davidson | Super Glide | Big Twin | 1974 | |
| Harley Davidson | Super Glide | Big Twin | 1975 | |
| Harley Davidson | Super Glide | Big Twin | 1976 | |
| Harley Davidson | Super Glide | Big Twin | 1977 | |
| Harley Davidson | Super Glide | Big Twin | 1978 | |
| Harley Davidson | Super Glide | Big Twin | 1979 | |
| Harley Davidson | Super Glide | Big Twin | 1980 | |
| Harley Davidson | Super Glide | Big Twin | 1981 | |
| Harley Davidson | Super Glide | Big Twin | 1982 | |
| Harley Davidson | Super Glide | Big Twin | 1983 | |
| Harley Davidson | Super Glide | Big Twin | 1984 | |
| Harley Davidson | Fat Bob | Big Twin | 1979 | |
| Harley Davidson | Fat Bob | Big Twin | 1979 | |
| Harley Davidson | Fat Bob | Big Twin | 1980 | |
| Harley Davidson | Fat Bob | Big Twin | 1981 | |
| Harley Davidson | Fat Bob | Big Twin | 1982 | |
| Harley Davidson | Super Glide II | FXR | 1982 | |
| Harley Davidson | Super Glide II | FXR | 1983 | |
| Harley Davidson | Super Glide II | FXR | 1984 | |
| Harley Davidson | Disc Glide | Big Twin | 1984 | |
| Harley Davidson | Sport Glide Police | Police | 1984 | |
| Harley Davidson | Low Glide | FXR | 1984 | |
| Harley Davidson | Super Glide II | FXR | 1982 | |
| Harley Davidson | Sport Glide | FXR | 1984 | |
| Harley Davidson | Low Rider | Big Twin | 1977 | |
| Harley Davidson | Low Rider | Big Twin | 1978 | |
| Harley Davidson | Low Rider | Big Twin | 1979 | |
| Harley Davidson | Low Rider | Big Twin | 1979 | |
| Harley Davidson | Low Rider | Big Twin | 1980 | |
| Harley Davidson | Low Rider | Big Twin | 1981 | |
| Harley Davidson | Low Rider | Big Twin | 1982 | |
| Harley Davidson | Low Rider | Big Twin | 1983 | |
| Harley Davidson | Low Rider | Big Twin | 1984 | |
| Harley Davidson | Wide Glide | Big Twin | 1980 | |
| Harley Davidson | Wide Glide | Big Twin | 1981 | |
| Harley Davidson | Wide Glide | Big Twin | 1982 | |
| Harley Davidson | Wide Glide | Big Twin | 1983 | |
| Harley Davidson | Wide Glide | Big Twin | 1984 |