Originally Posted by AntonLargiader
I finally got around to measuring the ones I have.
66mm upper clamp area
91mm lower clamp area
These measurements seem to be consistent for the dirt bike models. However I was missing data on the 950/990 models, but as luck would have it someone on their way south on a 990 adventure is crashing at my house for the next couple days. I measured his forks and got a very different measurement between clamping areas:
65mm upper clamp area
92mm lower clamp area
I used a crappy tape measure and judging by anton's avatar, his numbers for the clamping area lengths are probably better than mine, but the gap between the two is obviously MUCH bigger on the 990 I measured - not sure what year - so much so that they probably wouldn't work on an airhead.