Discreetly watch second bike TA 650 going though its MOT and I know that chain brings out worst of tester's OCD as it was marked as loose in advisory last year. I know it's in perfect condition and correctly tensioned but for him it's a fail for too slack. So he kindly gets the tools out and tightens it and passes it which is all shown on the new MOT paperwork Riding away stange noises are emitted from down by left foot. So when I get home promptly reset it back to how it was and all is well - I'm happy - the tester is happy! I'll still go back to him as he means well and is thorough in his own way.