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Bikes: 748S, HM1100S, V4SP, Was: DD-A #111
Posts: 13,088
Join Date: Feb 2002
Location: Back in Essex
Mood: Passion Killer
They are cast items and very brittle from my experience - I caught one of my spares and it snapped the edge off it really easily. It may have had an impact at some point or maybe had a stress line in the cast that made it weaker.