Triumph Pre-Unit Main Ball Bearing MJ 1 1/8" – Hepolite E1591 For 1938-62 5T T100 T110 TR6 T120

Restoring a classic Triumph?

This main ball bearing is exactly what you need for pre-unit engines built between 1938 and 1962.

Fits models like 5T, T100, T110, TR6, and T120.

It's the MJ 1 1/8 size, made by Hepolite—a trusted name in British bike parts.

Manufacturer part number 70-1591 C3, crosses to E1591.

Made in the United Kingdom, so it's authentic.

Brand new, never installed.

If you're rebuilding a bottom end, don't reuse old bearings—grab this and do it right.