Fork Seals are an essential component in motorcycle suspension systems, including those found on Triumph motorcycles. The seals sit at the junction where the fork tubes (stanchions) meet the lower sliders. They will prevent dirt, debris, and moisture from entering the fork internals while retaining the fork oil within.
- Importance
- Maintenance
- Eliminating Oil Leaks and the 1974 Bulletin
- 1978 Triumph 750 – “Leak proof” oil seals
- 1965-74 Triumph 350, 500, 650 Full Front End Rebuild Kit
- Parts for Modern Triumphs
Maintenance
It is crucial for the smooth operation of the motorcycle’s suspension system to properly maintain your seals. As a matter of fact, regular inspection and replacement of fork seals is highly recommended. Consequently, it can prevent leaks and ensure optimal performance. If the seals are damaged or worn, they can lead to oil leakage, which can affect the handling and stability of the motorcycle.
One of the changes to the Triumph 750 models for the 1978 model year was the introduction of the “leak-proof” style of fork seal. Additionally, the new pliable part is retained with a reusable steel washer, or circlip, which is not included in this fork oil seal set. It replaces part number 97-7010.
The “leak-proof” type of seals is a “floating” design and is compressed into place by the retaining washer, or in some forks, a retaining circlip. The I.D. measures 34mm, while the O.D. is 48mm. Also, these are sourced from LF Harris in the United Kingdom.
The updated late-model T140 seal is designed to reduce stiction and running friction compared with the previous one used on the 1971-1977 B-range models. Also, the floating-type fork oil seal can be fitted by hand and are retained in place by a steel washer or circlip.
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