Originally Posted by
reluctantsuburb
... a Mid-90s Yokota, specs pasted below ...
For details on the components, you can search the specs and details at the Shimano website:
Manuals & Tech Docs @ SI.Shimano.com .
The
Deore RD-M650 rear derailleur looks to have a 38T max capacity, and 32T max for the largest cassette sprocket. (Though, many people say that Shimano's gear typically is spec'ed conservatively and works a bit outside that range as well.) Standard period cassettes for that derailleur were up to 28-32T. A quick check on eBay, Harris Cyclery and a couple other places shows 7spd 32T max cassettes; didn't find any larger.
The
Deore FC-MT60 crank looks to have a 110/74mm BCD spec, for the 48/36/24T chainrings.