Well that was not what I wanted. A chance to learn new skills @ my age.

One would think one of these things would need the facility to compress / preload the rubbers , while assembling .
In the manner of the Cush being rotateable hard against one set ( Very Hard ) so as to be able to insert the second set ,
So both are in a Pre Tensioned ( pre-COMPRESSED ) condition installed .Therefore the oscilation is within thw working
LOAD , rather than swinging across and bumping at the ends ( of travel )thus a gentle damping , rather than a bump stop.

The spider was positioned in a clover leaf cut out in the sprocket and cushioned by epoxy that filed the void and provided a cush, The product was flexane 80 with a softening agent. Worked well until the crank nut fractured.

Matt Spencer wrote:One would think one of these things would need the facility to compress / preload the rubbers , while assembling .
In the manner of the Cush being rotateable hard against one set ( Very Hard ) so as to be able to insert the second set ,
So both are in a Pre Tensioned ( pre-COMPRESSED ) condition installed .Therefore the oscilation is within thw working
LOAD , rather than swinging across and bumping at the ends ( of travel )thus a gentle damping , rather than a bump stop.

As can be seen in teh last 3 or 4 minutes of this 10 minute video where aguy changes the rubbers on Triumph clutch hub.

With the Norton crank pulley....you are going to need a Norton crank to hold the taper section and probably you will need to create a tool using an old belt to rotate the outer whilst fitting the rubbers...

http://www.youtube.com/watch?v=ASe67Al5Mfo

I checked the Kushdrive sprocket website, , I emailed them , they dont stock anything listed on their website, admitted they had some problems with the product and says new upgraded products in a couple of months, seems they have the concept but cant get it together, would be good if they could but i have my doubts.