Franz and Grubb Engine
Triumph 650 750 Main Bearings
Regular price
$43.95
Genuine English made RHP bearings are the best choice for any Triumph rebuild. All of our bearings are in sealed factory packaging and should not be removed until ready for installation. For applications please see below.
Main bearings used by year and model
| engine | Timing side | Drive side |
| 500 to 1954 | 70-1592 | 70-1591 |
| 650 to 1954 | 70-1592 | 70-1591 |
| 500 1955-57 | 70-1591 | 70-1591 |
| 650 1955-62 | 70-1591 | 70-1591 |
| 650 1963-65 | 70-1591 | 70-1591 |
| 650 1966-71 | 70-1591 | 70-2879 |
| 650 1972-73 | 70-3835 (metric) | 70-2879 |
| 750 1973-76 | 70-3835 (metric) | 70-2879 |
| 750 1977-80 | 70-3835 (metric) | 70-2879 C2 |
Triumph Main bearing sizes
70-1591 ball bearing (RHP MJ1 1/8JC3)
70-1592 ball bearing (RHP MJ1JC3)
70-2897 roller bearing (RHP MRJA1 1/8JCN)
(70-2897 also interchanges BSA 68-0625)
70-3835 ball bearing (metric) 6306C3
(70-3835 also same as 60-4167)
70-2879 C2 roller bearing (RHP MRJA1 1/8JC2)
For any other bearing clearance requirements please contact the shop.
