Just an update on the belt issue. It started getting a bit sluggish again so I bit the bullet and decided to replace the belt and rollers. On ebay there's a couple of sellers selling non-original belts for £99.99 plus about £13 postage. Christ, I wondered how much a genuine Honda one would be. I phoned up and was flabbergasted to find that the are just £77.00!!! I ended up paying just £95 for an original belt and a set of original rollers. Good for another 12,000 miles.