Very unusual bike

Proto2000

Retro Guru
Was going through the local ads in the Bay Area and ran across this very unusual bike that was made here in San Francisco many years ago. I inquired about it and the gentleman who was selling it had quite a collection of desirable bikes that we all love. The pictures in the ad were not worthy of what I saw when I went to look at it, was in outstanding condition and was told that the way I see the bike is how it left the makers shop. This may have been on Retro Bike before but with a quick look, I saw only a few of these here and nothing to speak of on the interwebs. So after talking with the owner for an hour or so, I decided to buy this and leave it undisturbed. I will try to find a seat mast that is shorter to fit me better, JP is still in business and accommodating if a part is needed that he has. No more manufacturing of bike parts so fingers crossed he has a 2" shorter one. Second option is have a friend make one similar but that might cost more than I paid for the bike. So here is the bike I picked up this morning and I have not cleaned or replaced parts, as is picked up.
 

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Very interesting. It looks like the seat tube joint is on bearings, that's commitment to detail, for sure!
 
JP Morgen of Morgen Machine.
Still building custom motocross bikes etc..



al.
 
I bought a 1 1/8" XTR headset, did not have one, and is to arrive today so I got the bike prepped. After taking the stem off and the top nut I see it's a 1 1/4" headset. How many builders in the early 90's used 1 1/4" head tubes? My Ultimate has and I see some of the XTR on eBay 1 1/4", just never thought it was a thing then. BTW, the stem is connected to a stem adaptor, a bit on the wild side there too. Took a lot of work to free the adaptor from the fork.
 
Early 90's was where it was at for the 1 1/4 'evolution' headset

Gary Fisher mostly, along with pressfit bearings and 73mm bb shells
 
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