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Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
Posts: 13,086
Join Date: Feb 2002
Location: Back in Essex
Mood: Passion Killer
Looks like some kind of strengthening item. It uses the lower mounting holes in the engine (which are used for the rear brake m/c on later bikes and the 916 line) and then goes up to the swingarm mount point - maybe it's in an effort to reduce flex in the swingarm pivot? Doesn't look like it's adjustable at all...