Hobot ,
like Ircen said , these RT valves are not made for Roadholder type forks .
The way you want to install them they will never work : you need oil pressure to open the valve .
If you seal them against the inner stanchion wall , you can make them work for compression damping , but they are not meant to control rebound .
All this has been discussed in great length before .
Look long enough at this drawing and you will understand :
About these Ricor valves :
They seem to have an outer seal against the tube wall . staticmoves can confirm this ?
I found this pic of a dismanteled ricor valve :
Reading trough their sales talk :
"The solution RICOR ultimately arrived at employed a motion-sensing valve to determine whether movement is coming from the chassis or the wheel,..etc.." (quote)
All motion is relative , so I suppose they mean motion relative to the ground .
The valve is part of the unsprung weight , so its position relative to the ground is fixed .
I can understand that it is possible for the valve to ' see' a difference between chassis movement ( sprung weight) and wheel movement caused by road irregularities ( unsprung weight) .
It surprises me though that they can get enough mass in that small thing for a functional inertia valve , submerged in oil , but I'll have to take their word for it .
BUT :
I can imagine some form of human activity in a car that makes the chassis move up and down while the wheels stay still , but on a motorcycle ??
When riding over a road so smooth that the wheels don't move up or down , what on earth can make the chassis move ?.
I would think that all chassis movement is intiated by wheel movement ? .
Ultimately , it is all about metering oil flow , where slow speed flow is likely attributed to chassis movement and fast flow to wheel movement , like when hitting a bump in the road .
The faster oil flow creates more pressure , opening a secondary circuit to soften up the compression damping .
Nothing magical about that .
Progressive damping is always an improvement over fixed orifice damping .
What I don't see how this valve controls rebound damping , or does it rely on a separate circuit like the RT valves ?
Maybe I'll buy a set to find out ..
I suggest that anyone who thinks of installing these valves ( or any other fork upgrade ) to make shure they understand how their forks work .
I mean , not have a vague idea , but know
exactly what happens inside the fork .
I am under the impression that the placebo effect is very strong when it comes to forks ..
( ps : question for the native English speakers , is it 'damping ' or ' dampening' ? I see both used ..)