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Old 05-01-2011, 04:04 AM   #24
Outside the Pod-bay
vortexau's Avatar
Joined: Feb 2008
Location: Just off the Warrego, S.E. Queensland
Oddometer: 1,627
In the late sixties I inspected brand new BMW models in the showroom of the Qld distributor; Morgan and Wackers. I took home some of the glossy brochures on them- black (or white) R50, R60, & R69. BMW was experimenting with bar-end flashing indicators in that period. These models have quite substantial frames, and even sported ball-shaped sidecar mounts on the Right-hand side (Unfortunately, for Oz).

Its even possible (don't quite remember) that the brochure showed a sidecar, or two.

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Fast-forward to 1969. I looked over the new /5 models; R50/5, R60/5, and R75/5. Took home a thick BMW booklet that "Premiered" the slash 5s. Quite prominent inside, BMW announced that the new frame design meant that owners would have to forgo their use with a sidecar.

In 1971 I had my first BMW; a R50/5 with electric start. This was an extra cost option on the 500cc.

During the years 1974-1985 I was a member of the QLD BMW riders club. Legendary were the occurrences of broken sub-frames, and these mishaps were mainly on solos.

If someone wanted to build-up an outfit, they either used a complete pre-'69 model, or at least shoe-horned the /5, /6 motor into one.

(NB. My current, and first, outfit is my 4th BMW; from R25 to R100RS.)

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From 1973 I owned a Moto Guzzi 850T with the 'Telaio Rosso'-shape frame. This is how to build a strong frame . . . . . not what BMW did with their twin-loop plus bolt on.

Moto Guzzi V7 Sport, with the 'Telaio Rosso' legendary robust build. The 850T shared this frame style.

Two-piece motorcycle frame which can barely cope as a solo.

If I had the money, my R100RS engine would be mounted in a /2-type frame, or even a CJ.
I once rode it around the major holes on a road closed to ordinary traffic. The Ural tub & frame came through unscathed, but . . . . . welds broke at the front of the downtubes, & the upper triple fork plate came close to breaking away on the centre hole.

After that;
● Some welding.
● A set of Perry's reduced trail T-clamps (which are beefier than stock).
● Addition of a cross-brace bridging upper rear-frame connection bolts, which makes battery access more difficult. I'm in the process of changing over to an external (to bike) automobile battery.
'77 BMW R100RS with Ural chair
'08 Suzuki AN650A Burgman (and trailer)
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