EASTERN MOTORCYCLE PARTS Bearing — mainshaft bearing for 5-speed Big Twins, open end – 77-86 Sportster
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.
Replacement mainshaft bearing for 5-speed Big Twins. 🔧 This precision component restores smooth gear engagement and reduces play in the transmission mainshaft.
Engineered for reliable fitment, the bearing offers consistent performance under load. For best results, inspect mating surfaces and seals before installation, apply appropriate lubricant to the shaft, and follow factory assembly procedures. ✅
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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 | Sportster | Sportster | 1986 | |
| Harley Davidson | Sportster | Sportster | 1977 | |
| Harley Davidson | Sportster | Sportster | 1978 | |
| Harley Davidson | Cafe Racer | Sportster | 1977 | |
| Harley Davidson | Cafe Racer | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1977 | |
| Harley Davidson | Sportster | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1979 | |
| Harley Davidson | Sportster | Sportster | 1980 | |
| Harley Davidson | Sportster | Sportster | 1981 | |
| Harley Davidson | Sportster | Sportster | 1982 | |
| Harley Davidson | Sportster | Sportster | 1983 | |
| Harley Davidson | Sportster | Sportster | 1984 | |
| Harley Davidson | Sportster | Sportster | 1985 | |
| Harley Davidson | Sportster | Sportster | 1986 | |
| Harley Davidson | Sportster | Sportster | 1986 | |
| Harley Davidson | Roadster | Sportster | 1978 | |
| Harley Davidson | Roadster | Sportster | 1979 | |
| Harley Davidson | Roadster | Sportster | 1980 | |
| Harley Davidson | Roadster | Sportster | 1981 | |
| Harley Davidson | Roadster | Sportster | 1982 | |
| Harley Davidson | Roadster Custom Sport | Sportster | 1983 | |
| Harley Davidson | Roadster | Sportster | 1984 | |
| Harley Davidson | Roadster | Sportster | 1985 | |
| Harley Davidson | Sportster | Sportster | 1977 | |
| Harley Davidson | Sportster | Sportster | 1978 | |
| Harley Davidson | Sportster | Sportster | 1983 | |
| Harley Davidson | Sportster | Sportster | 1984 | |
| Harley Davidson | Sportster | Sportster | 1985 |