bias

rite the story hehe me clutch plates broke upto the plates breakin the egine was spot on no knocke rattles etc so i dropped the sump etc cleaned all broken bits out the camchain tensioner seems to be working ok put it back together now it got a knock and a whurrin noise like a chain snaggin rite i dropped the engine out when i was examining cams etc when i dismantled the cam chain it was very worn while the engine was out i rechecked bottom end to make sure no other bits floating about rite my question is can an over stretched cam chain slip a couple of teeth to cause a knock and whurrin noise like a chain catchin just wondered if anyone else expiernced this with an r1 any advice regarding this prob will be much appreciated thanks si