My speedo recently went further south than I have gone. So when I replaced it, I took a couple of pictures for those that haven't had the pleasure of not knowing how fast you are going. This is on a 2002 Vol.
I jacked the bike up to where there was just a slight drag of friction with the tire to the ground. I did not have to completely remove the wheel, there is enough room to replace the speedo sensor if that is all you have to do.
Here is what the sensor looks like (new). The 4 tabs you see are what breaks off and it will no longer catch the tabs that are part of the hub. Thus it won't spin and will not give you a speed indication.
Next is to remove the pinch bolt, the axle, and spacer.
(facing the bike from the front) Lean the wheel to the right, and you can pull the speedo sensor from the hub. Remove the old broken sensor, grease up the new one. I used the 60 moly grease. And then carefully put the new sensor in.
When mounting the sensor back to the hub, make sure that the tabs are going between the tabs that are part of the hub. This is where most are broken because when folks replace the wheel they do not pay attention to where the tabs are oriented in relationship to the hub tabs. You also want to make sure the locking slot on the back of the speedo housing (fork side) is secured to the small post on the fork.
With that done it's pretty much reverse order to get the wheel back together. Slide the wheel back to the right, put the spacer in, put your axle back in and torque to recommended specs ( I think it's 48 ft/lbs). The manual then recommends that you excersize the front forks before tightening the pinch bolt. I dropped the bike back on the ground and compressed the forks by pushing down on the handlebars. Then replace the pinch bolt and tighten to recommended specs ( I think it's 24 ft/lbs). Go for a test ride, unless you had maintenance hops during the procedure.
Hope this helps someone.