Serviceable = still working.

The 87 & 88 style centre seals certainly seem more robust than the 87-96 integrated seal, in my experience. We've rebuilt 1988 and NF5 cranks (before the T2 pattern seal was available) and reused the original seal many times, including NF5s that have gone on to do the Manx GP and Classic TT without issue. Not saying they are all always good, but most are.

As a note, for anyone maybe reading this later down the line, the 1987 (MC16) centre seal is a different ID to the 1988 MC18RJ, and there's currently no replacement. Again, they tend to be fine to reuse when rebuilding most cranks, but if the seal is damaged/worn, the only [current] solution is to find another crank with a good seal.

*Obviously there's no guarantee when re-using a seal. The client must accept all risk.
_________________
Andy.
NSR-WORLD.COM

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