I might be easier to use an adapter with whatever gear combo you can come up with than to search for a specific gear-set.
In my ramblings around I have found various speedometer drive adapters to compensate for tire sizes, gear ratios etc. A dear departed friend had a couple of boxes of these from the trucking company we worked at. They could be opened and various combinations of gear sets installed and screwed back together again. He had a couple dozen of these spur-gear sets, so you could add or subtract just about any % you wanted. There are no doubt others of these things floating around. I'll check with his widow next time I'm in the city.
Aside from that there are current production adapters available for selected % changes. I think Jim Carter will have them made up to order. IIRC they were about $70 last I looked. Other vendors sell them as well.
If anyone knows who sells speedo cables that are way long I'd like to know. I need one to go from the speedo to the brownie so I don't have to calculate speed from the tachometer. In some gear combinations the speedo driving off the main box is accidentlly correct but it would be nice to have it correct all the time.
