2022 Kawasaki KX112 Rear Suspension (UNI-TRAK®)
Rear Suspension (UNI-TRAK®)
- This motorcycle’s rear suspension system is called UNI-TRAK and consists of a rear shock absorber unit, a swingarm, two lever rods and a lever.
- The operating characteristics of the UNI-TRAK suspension are similar to those of the front fork.
- However, a linkage system is used to achieve progressive springing characteristics.
Rear Shock Absorber Inspection
NOTICE
- Sticking muds or dusts on the sliding surface of the rear shock absorber could damage the oil seal, leading to an oil leak. Clean the sliding surface after each ridedinton oil leak. Clean the slide pump the seat down and up by 4 or 5 times, and inspect the smooth stroke.
- If it does not smoothly or noise is found, inspect the oil leak and rear shock absorber mounting.
- Visually inspect the rear shock absorber for oil leakage.
- If necessary, replace by an authorized Kawasaki dealer
Rear Shock Absorber Adjustment
The spring preload of the shock absorber can be adjusted or the spring can be replaced with an optional one to suit various riding conditions. In addition, the damping force can be adjusted easily, making it unnecessary to change the oil viscosity
Rebound Damping Adjustment
To adjust the rear shock absorber rebound damping, turn the rebound damping adjuster at the bottom of the rear shock absorber with a flat tip screwdriver.
A. Rebound Damping Adjustmer
Rebound Damper Settings
- A. Seated Position (Adjuster Turned Fully Clockwise)
- B. Softer (Counterclockwise)
- C. Harder (Clockwise)
- D. Standard Setting
Number of turns counterclockwise usable range
- 21 clicks or more.
Standard Rebound Damper Setting_
- 11 clicks
Counterclockwise from the fully seated position
NOTICE
Do not force the rebound damping force adjuster beyond the fully seated position, or the adjusting mechanism may be damaged.
NOTE
Adjustment of the rebound damping adjuster for the rear suspension will slightly affect the compression damping force. Always make any damping adjustments in small steps and test their effects before using them in competition.
Compression Damping Adjustment (Gas Reservoir)
To adjust compression damping, turn the compression damping adjuster on the gas reservoir with a flat tip screwdriver until you feel a click.
- A. Compression Damping Adjuster
If the damping feels too soft or too stiff, adjust it in accordance with the following table.
Compression Damper Settings
A. Seated Position (Adjuster Turned Fully
Clockwise)
B. Softer (Counterclockwise)
C. Harder (Clockwise)
D. Standard Setting
Number of turns counterclockwise usable range
- 24 clicks or more.
Standard Compression Damper Setting
- 14 clicks
Counterclockwise from the fully seated position
NOTICE
Do not force the compression damping force adjuster beyond the fully seated position, or the adjusting mechanism may be damaged.
NOTE
Adjustment of the compression damping adjuster for the rear suspension will slightly affect the rebound damping force. Always make any damping adjustments in small steps and test their effects before using them in competition.
Spring Preload Adjustment
- Remove the seat bolts.
- Remove the seat rearward.
- Remove the side cover bolts.
- Remove the side covers.
- A. Seat Bolt (Both Sides)
- B. Seat
- C. Rearward
- D. Side Cover Bolt (Both Sides)
- E. Side Cover (Both Sides)
- Remove the bolts, nuts, washers, and rear fenders.
- Remove the bolts and collars, and remove the rear flap.
- A. Bolts, Nuts, and Washers
- B. Bolts
- C. Rear Fender
- D. Bolts and Collars
- E. Rear Flap
- Remove the rear frame pipe bolts and nuts, and remove the rear frame pipe.
- A. Rear Frame Pipe Bolts and Nuts
- B. Bolt
- C. Rear Frame Pipe
- Remove the muffler (see Exhaust System section).
- Loosen the air cleaner duct clamp screw.
- Remove the bolts and take off the air cleaner case with the air cleaner duct.
- A. Air Cleaner Duct Clamp Screw
- B. Bolts
- C. Air Cleaner Case
- D. Air Cleaner Duct
- Stuff a clean cloth into the carburetor opening to prevent dust or dirt from entering the carburetor.
- Raise the rear wheel off the ground using a jack (special tool: 57001-1238) and attachment (special tool: 57001-1608).
- Using 57001-1101, 1580), loosen the rear shock absorber spring locknut on the rear shock absorber. the hook wrenches (special tools:
- A. Rear Shock Absorber Spring Locknut
- B. Spring Preload Adjusting Nut
- C. Hook Wrench R35 (Special Tool: 57001-1580)
- D. Hook Wrench R37.5 (Special Tool: 57001-1101)
- Using the hook wrench (special tool: 57001-1101), turn the spring preload adjusting nut as required.
- Turning the adjusting nut down increases the spring preload.
- A. Hook Wrench R37.5 (Special Tool: 57001-1101)
- B. Spring Preload Adjusting Nut
- The standard adjusting nut position from the center of the upper rear shock absorber pivot point is 67.5 mm (2.66 in.).
- The adjustable range is 63 81 mm (2.5 3.2 in.).
- A. Adjusting Nut Position
- B. Center of Upper Rear Shock Absorber Pivot
- C. Spring End
- Tighten the rear shock absorber spring locknut.
- After making the adjustment, move the spring up and down to make sure that it is properly seated.
- Install the air cleaner case with air cleaner duct.
- Install the muffler (see Exhaust System section).
- Replace the rear frame pipe nuts with new ones.
- Install the rear frame pipe.
- Tightening Torque
- Rear Frame Pipe Nuts: 35 Nm (3.6 kgfm, 26 ft-ib)
- Replace the rear fender mounting nuts with new ones.
- Install the removed parts.
Optional Rear Shock Absorber Springs
- Various rear shock absorber springs are available to achieve suitable rear shock absorber action in accordance with the rider’s weight and track condition.
- A harder spring stiffens the shock absorber action and accelerates the rebound damping.
- A softer spring softens the shock absorber action and slows down the rebound damping.
WARNING
- Improper removal or installation of the rear shock absorber spring may cause the spring and/or related parts to be ejected at high velocity. Always wear eye and face protection when working on the rear shock absorber.
- Removal and installation of the rear shock absorber spring should be performed by an authorized Kawasaki dealer.