I was changing to yz timing the other day and when I removed the cam shaft retainer I could not see the clip from beneath the retainer anywhere. I have searched inside all the possible entrances into the engine with a lighted telescopic magnet and can not find it anywhere. Has anyone else had this problem and could tell me if there is anyway it could have found its way below the crankshaft or something. It is possible that it didn't actually fall inside the engine, but I can't find it anywhere, and I didn't see or hear it drop or anything when I removed the cam retainer its like it never existed. Any suggestions?