I washed the bike the other day. After moving the bike I found a Circlip on the ground on the rider's right side from the counter sprocket forward :eek1. I can't see where it goes. I'm not 100% sure it is a even part for the bike but have a feeling it is . I searched the fiche and found just one such circlip, item 5: http://www.maxbmwmotorcycles.com/fiche/DiagramsMain.aspx?vid=51596&rnd=03252011 (11_3997 - ENGINE HOUSING COVER, LEFT) but it is an internal piece and the release lever (item 8) has never been removed from the bike. McMaster-Carr calls the circlip a "metric side-mount external retaining ring (E-Style)": http://www.mcmaster.com/#retaining-rings/=hre0t4 The one I have in hand measures 12mm outside diameter (A), 6mm inside ear to ear and is approximately .5mm thick. The clip is non-magnetic. A magnet won't pick it up so it is not made of steel. It is a dull grey color. Any ideas out there? Desperate and much obliged!