I'm checking everything, valve clearance ,valve timing because the bike has been stood for a long time, and I have no history, other than 33000 k from new 1989. My concern is the way the cam chain sits on the sprockets. It sits very high on the teeth, with plenty of daylight between the teeth and the chain.My concern is that the wrong chain has been fitted at some time. However it doesn't look as if the engine has been split, and everything checks out apart from 1 inlet valve where the clearance is below the 0.004 lower limitat 0.003". Is this cam chain/sprocket clearance normal?