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[simon]

Is it worth maybe just filling it up and riding it a bit further whilst listening carefully for any change in sound? I say this because I had the same experience with mine a few years back and I pulled it all apart and split the crankcase to find nothing whatsoever wrong. This was the bike making the intermitent clanking because of the oil pump spindle occasionally slipping teeth so I was sure I was about to find the cause of both the noise and the swarf. Several years since and having changed the oil quite a few times ( and sortedthe slipping spindle) I have never seen any metal in the oil since. Ive no idea what caused it but I do know a very small amount of swarf or metal dust does look like a lot when suspended in oil.

[Adrian]

It possibly could be something unimportant, but I'd hate to risk it without knowing what exactly those metallic particles were off. Bearing/crankpin fragments? white metal? Other alloy?



The steel con-rod is still worth doing, we've all seen pictures of the damage a snapped alloy con-rod can do and original Redditch 500 cases aren't so common, though 350 cases still seem easier to come by (in the UK, at least).



A.