Andy wrote:Pretty easy to tell the MC28 for 21 forks really. The caliper mounts (and consequently the calipers) are the give-away. Not only are they visually different to the MC18 and MC21, but the fork mounts are blind, and the calipers threaded.

Maybe the clip-ons are NC29 or NC30? I'm not sure if they have a different rake, which makes them come closer to the NSR frame on full lock? Just theorising!

Are the locating bosses present on the clip-ons? Maybe someone's cut them off to enable them to be pulled back more than standard, and you've just not noticed?