
FRONT FORK SETTING
The front fork setting should be made depending on the rider’s feeling of an actual run and the circuit conditions.
The front fork setting includes the following three factors:
1.Setting of air spring characteristics
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Change the fork oil amount.
2.Setting of spring preload
-
Change the spring.
3.Setting of damping force
-
Change the compression damping force.
-
Change the rebound damping force.
The spring acts on the load and the damping force acts on the cushion travel speed.
CHANGE IN AMOUNT AND CHARACTERISTICS OF FORK OIL
Damping characteristic near the final stroke can be changed by changing the fork oil amount.
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A. |
Air spring characteristics in relation to oil amount change |
B. |
Load |
C. |
Stroke |
1. |
Max. oil amount |
2. |
Standard oil amount |
3. |
Min. oil amount |
SETTING OF SPRING AFTER REPLACEMENT
As the front fork setting can be easily affected by the rear suspension, take care so that the front and the rear are balanced (in position etc.) when setting the front fork.
1.Use of soft spring
-
Change the rebound damping force.
Turn out one or two clicks.
-
Change the compression damping force.
Turn in one or two clicks.
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2.Use of stiff spring
-
Change the rebound damping force.
Turn in one or two clicks.
-
Change the compression damping force.
Turn out one or two clicks.
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FRONT FORK SETTING PARTS
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Front fork spring
STD Spring rate |
4.7 |
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Type |
Spring rate N/mm |
Part number |
I.D. mark (slits) |
SOFT |
4.5 |
BR9-23141-20 |
I-II |
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4.6 |
BR9-23141-30 |
I-III |
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4.7 |
BR9-23141-40 |
I-IIII |
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4.8 |
BR9-23141-50 |
I-IIIII |
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4.9 |
BR9-23141-60 |
II-II |
|
5.0 |
BR9-23141-70 |
II-III |
STIFF |
5.1 |
BR9-23141-80 |
II-IIII |
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REAR SUSPENSION SETTING
The rear shock absorber setting should be made depending on the rider’s feeling of an actual run and the circuit conditions.
The rear suspension setting includes the following two factors:
1.Setting of spring preload
-
Change the set length of the spring.
-
Change the spring.
2.Setting of damping force
-
Change the rebound damping force.
-
Change the compression damping force.
CHOOSING SET LENGTH
1.Place a stand or a block under the engine to put the rear wheel above the floor, and measure the length “a” between the rear wheel axle center and the rear fender holding bolt.

2.Remove the stand or block from the engine and, with a rider astride the seat, measure the sunken length “b” between the rear wheel axle center and the rear fender holding bolt.

3.Loosen the locknut “1” and make adjustment by turning the adjuster “2” to achieve the standard figure from the subtraction of the length “b” from the length “a”.
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SETTING OF SPRING AFTER REPLACEMENT
After replacement, be sure to adjust the spring to the set length [sunken length 90–100 mm (3.5–3.9 in)] and set it.
1.Use of soft spring
-
Adjust to decrease rebound damping force to compensate for less spring load. Run with the rebound damping force adjuster one or two clicks turned out, and readjust it to suit your preference.
2.Use of stiff spring
-
Adjust to increase rebound damping force to compensate for greater spring load. Run with the rebound damping force adjuster one or two clicks turned in, and readjust it to suit your preference.
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REAR SHOCK ABSORBER SETTING PARTS
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Rear shock spring “1”
STD Spring rate |
56 |
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Type |
Spring rate N/mm |
Part number |
I.D. mark |
SOFT |
52 |
BR9-22212-00 |
Yellow |
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54 |
BR9-22212-10 |
Pink |
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56 |
BR9-22212-A0 |
White |
BR9-22212-20* |
White |
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58 |
BR9-22212-B0 |
Gold |
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BR9-22212-30* |
Silver |
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STIFF |
60 |
BR9-22212-40 |
Brown |
* For BSB6
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Spring preload adjusting positions
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SUSPENSION SETTING (FRONT FORK)
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Symptom |
Section |
Check |
Adjust |
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---|---|---|---|---|---|---|
Jump |
Large gap |
Medium gap |
Small gap |
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Stiff over entire range |
✓ |
✓ |
✓ |
|
Compression damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
Oil amount |
Decrease oil amount by about 5–10 cm³ (0.2–0.3 US oz, 0.2–0.4 Imp.oz). |
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Spring |
Replace with soft spring. |
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Unsmooth movement over entire range |
✓ |
✓ |
✓ |
✓ |
Outer tube Inner tube |
Check for any bends, dents, other noticeable scars, etc. If any, replace affected parts. |
Slide metal |
Replace with a new one for extended use. |
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Piston metal |
Replace with a new one for extended use. |
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Lower bracket tightening torque |
Retighten to specified torque. |
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Poor initial movement |
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✓ |
Rebound damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
Oil seals |
Apply grease in oil seal wall. |
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Soft over entire range, bottoming out |
✓ |
✓ |
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Compression damping force |
Turn adjuster clockwise (about 2 clicks) to increase damping. |
Oil amount |
Increase oil amount by about 5–10 cm³ (0.2–0.3 US oz, 0.2–0.4 Imp.oz). |
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Spring |
Replace with stiff spring. |
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Stiff toward stroke end |
✓ |
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Oil amount |
Decrease oil amount by about 5 cm³ (0.2 US oz, 0.2 Imp.oz). |
Soft toward stroke end, bottoming out |
✓ |
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Oil amount |
Increase oil amount by about 5 cm³ (0.2 US oz, 0.2 Imp.oz). |
Stiff initial movement |
✓ |
✓ |
✓ |
✓ |
Compression damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
Low front, tending to lower front posture |
✓ |
✓ |
Compression damping force |
Turn adjuster clockwise (about 2 clicks) to increase damping. |
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Rebound damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
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Balance with rear end |
Set sunken length for 95–100 mm (3.7–3.9 in) when one passenger is astride seat (lower rear posture). |
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Oil amount |
Increase oil amount by about 5 cm³ (0.2 US oz, 0.2 Imp.oz). |
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“Obtrusive” front, tending to upper front posture |
✓ |
✓ |
Compression damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
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Balance with rear end |
Set sunken length for 90–95 mm (3.5–3.7 in) when one passenger is astride seat (upper rear posture). |
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Spring |
Replace with soft spring. |
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Oil amount |
Decrease oil amount by about 5–10 cm³ (0.2–0.3 US oz, 0.2–0.4 Imp.oz). |
SUSPENSION SETTING (REAR SHOCK ABSORBER)
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Symptom |
Section |
Check |
Adjust |
|||
---|---|---|---|---|---|---|
Jump |
Large gap |
Medium gap |
Small gap |
|||
Stiff, tending to sink |
|
|
✓ |
✓ |
Rebound damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
Spring set length |
Set sunken length for 90–100 mm (3.5–3.9 in) when one passenger is astride seat. |
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Spongy and unstable |
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✓ |
✓ |
Rebound damping force |
Turn adjuster clockwise (about 2 clicks) to increase damping. |
Low compression damping |
Turn adjuster clockwise (about 1 click) to increase damping. |
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Spring |
Replace with stiff spring. |
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Heavy and dragging |
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|
✓ |
✓ |
Rebound damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
Spring |
Replace with soft spring. |
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Poor road gripping |
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|
✓ |
Rebound damping force |
Turn adjuster counterclockwise (about 2 clicks) to decrease damping. |
Low compression damping |
Turn adjuster clockwise (about 1 click) to increase damping. |
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High compression damping |
Turn adjuster clockwise (about 1/6 turn) to increase damping. |
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Spring set length |
Set sunken length for 90–100 mm (3.5–3.9 in) when one passenger is astride seat. |
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Spring |
Replace with soft spring. |
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Bottoming out |
✓ |
✓ |
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High compression damping |
Turn adjuster clockwise (about 1/6 turn) to increase damping. |
Spring set length |
Set sunken length for 90–100 mm (3.5–3.9 in) when one passenger is astride seat. |
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Spring |
Replace with stiff spring. |
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Bouncing |
✓ |
✓ |
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Rebound damping force |
Turn adjuster clockwise (about 2 clicks) to increase damping. |
Spring |
Replace with soft spring. |
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Stiff travel |
✓ |
✓ |
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High compression damping |
Turn adjuster counterclockwise (about 1/6 turn) to decrease damping. |
Spring set length |
Set sunken length for 90–100 mm (3.5–3.9 in) when one passenger is astride seat. |
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Spring |
Replace with soft spring. |