Originally Posted by
fliplap
The geometry, lugs, braze-ons, internal wiring harness, rear brake cable stop, chain slap guard, are all spot on for a 1000. The 1986 theory comes from pouring over the the catalogs. 1986 seems to be the only year in which the 1000 had both STB (splined triple butted) tubing and the older style seat stay rack mounting tabs, vs the barrel style of the 1987. Also, while the 85, 87, 88 and 89 catalogs all clearly show semi horizontal dropouts, it seems like the 1986 Miyata 1000 might have been the only year to receive vertical dropouts. This catalog scan, while low res, seem to suggest that is the case.
The rack tabs and the seat stay caps are very indicative... I've never given the lugs that much thought, and have never measured angles on a bike-
My 1990 had the barrels and Miyata branded seat stay caps:
Miyata seat stay cap by
Dave The Golden Boy, on Flickr
As well as the vertical dropouts:
1990 Miyata 1000LT by
Dave The Golden Boy, on Flickr
This is another interesting thing that goes towards the idea that the touring market PRECIPITOUSLY crashed in 84/85/86. The best, most glorious and grand touring bikes came out in 1985- Then Trek dropped touring bikes for a year, Schwinn roped the Voyageur SP and Voyageur models into just the Voyageur- pretty much every company, except Miyata rolled back the classical "grand-ness" of their touring bikes. If Miyata had prepared a metric ****-ton of glorious triple butted 1000s- but couldn't sell them- and since they changed a few of the design elements- getting the leftover frames to Koga for dressing up as "new" model would be a great idea to use them up. Upgrading them to the current model of XT, and chroming the stays gives it a very *new* look.
Unless, of course, other models of the Koga-Miyata bikes also had rack tabs and spoon caps- if that was still a Koga" thing.