[Darren69]

I just had a flick through Falloons Ducati Racers book and some interesting pics in there. I haven't read the text but I think Ducati had obviously tried the parallel arm if you consider Tony Rutter's TT2 bike; first slide.

http://www.ducati.com/history/80s/tt2_/index.do

I think that's what you're expecting it to look like? The early TT1 is the same but the caliper is on top and the arm below then running parallel and then on the later F1 750 TT1 bike both the caliper and arm are on top and with the same angle as the Monster one but upside down.

http://www.ducati.com/history/80s/750_f1/index.do

The later 851 seemed to run a variety of setups including heavily braced swingarms that wouldn't allow for the arm, then none with the caliper on top and then the 888 which is similar to the Monster we know.

I'll have to read the damn book properly and see if there is any info as to why?