Hi Zefer,
I am just about to install the new dampers...here’s the instructions that came from Don (Madass):
When fitting the dampers best method is have your forks fitted to the bike minus the internals.
Fit the new damper assembly as supplied thru the big top washer and gauge holder then into the top of the forks.
Fit the countersunk screw and alloy washer underneath to secure the damper tube and tighten.
Compress the forks a couple of inches so the spring is exposed.
Slowly pour the fork oil against the spring.
Extend forks and fit and tighten the big alloy fork nut (bolt)
DONT undo the above fork nut as it will screw up the preset needle valve adjustment.
some basic fitting info
The only tools you need to fit the dampers after you have removed the old internals is a 5mm allen key and a spanner for the top alloy fork nut (bolt) I find that a 12" adjustable wrench is best for this.
DO NOT remove or loosen the top alloy fork nut (bolt) this is very important
DO NOT adjust the brass adjuster with allen key supplied until after the dampers are fitted and ready to do testing to get your desired settings.
Fit new assemblies as supplied
Fit lower countersunk retaining screws and alloy washers and tighten with 5mm Allen key.
Compress the forks until a few inches of spring is showing.
Slowly pour against the spring 150ml of 10w fork oil.
Extend forks and fit and tighten top alloy fork nut (bolt).
Fit wheel etc.
Pump the forks a dozen times or so to prime the dampers
Then make small adjustments to one side only until you have some dampening or rebound, then do other side
Road test and make small adjustments to suit
Whatever you do DO NOT loosen or remove the top alloy fork nut (bolt) as this will upset the factory setting