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I now how finished the bike. Out driving with the sports bike club, triple digit speeds in 4th and 6,000 rpm in 5th ( 11/32) Went with the light magnesium wheels single 320 mm front rotor with 4 pot Brembo . Fully braced frame, R100r forks Race teck etc light battery and starter frame mounted s fair...

Wheels made in W. Germany for R90 BMW to allow a rear disk . Very light magnesium alloy. Appear to be cast. I do not know much about them. I took out the bearing for the stock R90 axel. Fitted with larger bearing to accept 25 mm R100R axel

started with this

This is my mock assembly before painting the frame

Ok nimble is not an ok word how about more fun than my 1978 rs, my 1977 rs , my 1995 (yes '95") r80 and the R100gspd, just goes where I aim it and now for the first time I am wearing the sides of the tires from leaning around turns comfortably. So it is fast going along switch backs and require...

When I first got my 1975 r90s it did not ride that well even with 14,000 mi on it. Each change I made was an improvement. I tried several different springs but went back to ¾ spacer with bmw springs to give me the correct sag for my 165 pounds, Added a Toaster Dan brace, that helped, added San Jose ...

On Thu, Mar 8, 2012 at 4:49 PM, Alex <alexgoodhart@ymail.com> wrote: In building a 1974 R90S I am seeking advise of former racers/ cafe etc. I will be using a set of very light Kuma Magnesium 5 spoke wheels similar to Morris. The fork is a reworked R100R with Gold vale and linear springs for my weig...