It squeals on my Super 3, but it is reducing. I was told by a person in the factory if the belt is a little tight, it will squeal. I'm going to run mine for the first 3 months and if it annoys me then have it looked at, at the first check / service (which is at 3 months). As I put on my other post, under full throttle with the Sports Exhaust, the last thing in your ears / on your mind is the squeal.
That's a great reason to ask for a sports exhaust - it drowns out the squealing drive belt! I wonder if I can convince Morgan that supplying me a FOC sports exhaust is a good solution! ;-)