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rear shock ratio
Posted: 04:41 pm Jul 22 2010
by budpat105
Does any one know what the rear shock linkage ratio is ? I know this is a tough one but this forum has some KDX wizards. Thanks
Posted: 02:50 am Jul 26 2010
by michael
could you not divide wheel travel by the amount of shock travel?
say for example.
300mm wheel travel
-------------
100mm of shock shaft
= 3:1 ratio....
stab in the dark?
Posted: 07:51 am Jul 27 2010
by gregp
It is not as easy as that. The linkage system is progressive. The first inch of wheel travel usually equates to only 1/4" of shock travel, but once you get down near bottoming out, the last inch of wheel travel trys to move the shock shaft a full inch or so.
Even KTM's PDS system uses simple geometry to take advantage of the angle change between the swingarm and the shock to offer a slight decrease in leverage ratio as the wheel travels through its range of motion. They start off with an angle like this < and end up more like this L.
Husqvarna also offered this design with their layed down shock positions in the late 70's and early 80's...
Posted: 09:57 pm Jul 27 2010
by budpat105
What I'm trying to figure out is how many MM of shims I need to put in the shock to lower bike 2" Thanks
Posted: 02:05 pm Aug 12 2010
by rbates9
I had found on the web a site that sells a lowing link for the Kdx.
http://www.carlscycle.com/eshopitems_ca ... wasaki.htm give them a try. looks a lot easier than shimming the shock, and if you don't like it you can undo it pretty easy.
Posted: 03:50 pm Aug 12 2010
by gregp
If you want to retain the stock pull rods, and put a spacer under the shock piston, I would suggest using a 3/8" - 1/2" spacer. This will equate to somewhere around 2 inches of travel reduction.