link shown above.
link is slightly shorter and will lower the rear .4 inches less on most
models. *Scroll down to see the chart at the bottom of this
page for exact lowering amounts for most models. (CRF4 links lower the
rear of the 05 CRF450X/M 1 3/4")
Raise the motorcycle with a bike stand, milk crate, etc., so the rear wheel
is just slightly off the ground. Remove the two 19 mm nuts that hold
the “H” link to the rocker and the engine cradle and push the bolts out
the left side/front mounting bolt first. The lower chain roller comes
out with the front bolt and the swing arm may need to be raised slightly
to allow the rear bolt head to clear the chain. **If you have the Pro-moto
Billet side stand or the X" model CRF, the side stand must be removed before
the front link mounting bolt can be removed.
The new links come with only the bearings and seals, so install the center
sleeve and the two step washers (flat side out) from your old
linkinto the new link. Install the new link on the bike (rear mounting
bolt first) by pushing the mounting bolts in from the left side. You
may have to raise the swingarm slightly to align the front mounting holes.
After installing the KoubaLinks, be sure the 90 degree grease fitting is
facing down. *Left link engraving will be upside down and backwards,
right side will be readable left to right. Install the washers/nuts, torque
to 35 lbs-ft.
For the best performance, set the sag (amount of vertical movement of the
rear axle FROM no weight to bike weight plus rider weight) at 3.10"
with rider in full riding gear, standing on the pegs. Slide the fork
tubes up until they barely clear the bottom of the stock bars. *Do
not over torque the triple clamp bolts. (14 lbs-ft lower, 17 lbs-ft.
should leave 3/8" showing below the standard line on the "R" models.
If the links are for lowering purposes ONLY, sag can be set at 100mm/ 3.90".
The easiest way we have found to adjust the rear spring preload is to use
a long punch to loosen the top jam nut from the right side and grasp the
spring at the bottom and turn the spring and the nut at the same time.
** You have to put some lube on the shock threads to allow the nut to turn
freely. Turning the spring/nut "clockwise" increases the preload
and decreases the sag. **Do not forget to tighten the jam nut
with the punch after setting the sag.
For additional lowering of the front, the bars can be spaced up by installing
a washer of 1/4" max thickness on top of the flanged washer above
the top rubber mount on both sides. This will allow the forks
to be slide up farther, but is not recommended on all CRF models
unless you require quicker steering.
Lowering the rear more than the front can change the geometry and could
affect the handling, so be careful out there.
you like what the KoubaLink does for your suspension, please tell everyone,
if you do not, please tell us. We can be contacted at our email
address below and are always interested in your questions or comments.
all sorts of useful info on the CRF250X models go too: