KoubaLink.com
Motorcycle Suspension Components
with other products available from Kientech Engineering
Installation
Instructions
Fits: 2006-up Aprilia RXV/SXV/450/550. PN APR3
Lowers Rear 1.75 inches.
Lowering amounts are measured straite up from the center of the rear axle
with the axle/chain adjusters
in the forward part of the adjustment range or as they came from Aprilia.

1) 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 and flat washers 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 kickstand mount needs to be removed before the front link mounting
bolt can be
removed. The swing arm may need to be raised slightly to allow the
link mounting bolts to
be removed and/or to clear the chain.
2) 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 OEM link
into 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
will have to lift the swingarm up to align the front mounting holes.
3) 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.
4) 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 3.40" with rider in
full riding gear,
standing on the pegs. Slide the fork tubes up until they barely clear
the bottom of the stock
handle bars. *Do not over torque the triple clamp bolts. (14
lbs-ft lower, 17 lbs-ft. upper) 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 may need 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.
5) 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 if you require quicker
steering. *Disclaimer:
Sliding the fork tubes up too far will allow the tire to hit the fender
when bottomed, so be
careful out there.
*Note:
The bearings we use in these links are used
in the 05-06 Honda CRF450X and are
the same ID as the stock Aprilia link, but are 1 mm smaller OD. Also
both of the bearing
seals are the same as the 02-up Honda CRF250/450
If 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.
Norm Kouba
Email: njkouba@ix.netcom.com
Ordering info. and pricing can be found on our ORDER
FORM.
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OUR GOAL
IS TO BUILD
THE BEST
POSSIBLE
SUSPENSION
COMPONENTS
AND PROVIDE
THE CUSTOMER
WITH THE
HIGHEST
LEVEL OF
SERVICE
Norm Kouba
Email: njkouba@ix.netcom.com
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2009 KoubaLink
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