Shimano Light action Deraileur question

Stephen Simon said:

I have an older schwinn letour bike 1987 that came equipped with Shimano SIS derailers that say
Light Action on them. The rear was indexing 6sp and I found it would index 7spd. Would this rear
derailleur index 9spd with Shimano Dura Ace Bar end shift levers? I have found it will cover the
distance across all cogs. Using with 12-25 105 cassette and sugino 52-38 rings on ultegra hubs.
SRAm 9spd chain.

That was an early-generation S.I.S. derailer, but the indexing is the same as all Shimano rear
derailers except for pre-1997 (pre-9-speed) Dura-Ace.

The derailer doesn't care how many sprockets, this will index with any Shimano cassette and the
corresponding shifter.

Sheldon "S.I.S." Brown +------------------------------------------+
| So we'll go no more a roving |
| So late into the night, |
| Though the heart be still as loving, |
| And the moon be still as bright. |
| |
| For the sword outwears its sheath, |
| And the soul wears out the breast, |
| And the heart must pause to breathe, |
| And Love itself have rest. |
| |
| Though the night was made for loving, | And the day returns too soon, | Yet we'll go no more a
| roving | By the light of the moon. | --Lord Byron |
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