Chassis Adjustments - Honda CR125R 2006 Owner's Manual

The following suggestions may improve a
specific concern. Subtle changes in overall
handling may also be noted.
Rear End
If you have a problem with rear wheel traction,
raise the rear end of your CR by increasing the
rear spring pre-load. Instead of running 3.9 in
(100 mm) of sag, you can run 3.5 in (90 mm) so
the rear of the bike will sit a little higher. This
should produce more traction because of the
change to the swingarm and the location of your
CR's center of gravity.
If you have a problem with the steering head
shaking when you use the front brake hard or if
your CR wants to turn too quickly, lower the rear
of the motorcycle by reducing the rear spring
pre-load. This will increase fork rake and trail
and should improve stability in a straight line.
The effective suspension travel will be
transferred toward the firmer end of wheel travel.
Keep the race sag adjustment (page 94) in the 3.5
– 3.9 in (90 – 100 mm) range.
Fork Height/Angle
The position of the fork tubes in the clamps is
not adjustable.
Standard Position
The standard position (1) aligns the index groove
(2) with the top of the upper clamp (3).
(2)
(3)
(1)
(1) standard position
0.3 in (7 mm)
(2) index groove
(3) upper fork clamp
Standard Position For Optional Front Wheel
If you install the optional 20 inch wheel, align
the top of the fork tube (5) (not the top of the
fork cap) with the top of the upper fork clamp
(6).
(5)
(4)
(6)
(4) standard position
for optional front
wheel 0 in (0 mm)
(5) top of fork tube
(6) top of upper fork
clamp

Chassis Adjustments

Wheelbase
Adjusting your CR's wheelbase can offer subtle
changes in overall handling. You may adjust
wheelbase by adding or removing links on the
drive chain. If you change the wheelbase, be
sure to re-check race sag and adjust, if necessary.
In the past, a general rule was lengthen the
wheelbase to add straight line stability, shorten
the wheelbase to improve turning. However, we
suggest you do not lengthen the wheelbase of
your CR unless you are racing on a track with
more fast sections than normal.
As a general recommendation, keep the
wheelbase as short as possible. This positions
the wheels closer together, improves turning
response, increases weighting (traction) on the
rear wheel, and lightens weighting on the front
wheel.
With your CR, you will probably find that the
standard setting or a shorter wheelbase will offer
more overall benefits.
Adjustments for Competition
107