Engine configs

} I think DKW made a triple with two vertical and one horizontal
} cylinder.

Only as a racer.

It started as a parallel twin with a rotary inlet valve in the front
of the crankcase, but when they needed more power Woolf and Jacob
(DKW's designers) went to piston-porting, moved the magneto elsewhere,
stuck a third cylinder where the inlet port was, and presto.

--
// Rik Steenwinkel '85 R80ST Skippy bike
// Enschede '91 R100GS/PD The Great Unwashed
// Netherlands ('76 Honda CB250G Bouwpakketje)
// "Far away is only far away '90 K75C Kommutabike
// if you don't go there" '81 MZ TS250/1+LSW Badkuip

 

} }
} > http://www.doidschleera.de/KFZ/2R/BK350GES.HTM
}
} Are they primitive USD forks?

No, just conventional ones with rather short sliders. And the
stanchions don't go all the way up to the triple clamps, but are
mounted in a sturdier tube. That way you can have a relatively stable
front fork without having to manufacture two long, large-diameter,
plated, precision tubes, those being not exactly easy to come by in
the German Democratic Republic.

--
// Rik Steenwinkel '85 R80ST Skippy bike
// Enschede '91 R100GS/PD The Great Unwashed
// Netherlands ('76 Honda CB250G Bouwpakketje)
// "Far away is only far away '90 K75C Kommutabike
// if you don't go there" '81 MZ TS250/1+LSW Badkuip