Kawasaki Ninja Service Manual: Spring Preload Adjustment

Kawasaki Ninja Service Manual / Suspension / Rear Shock Absorber / Spring Preload Adjustment

Remove the rear shock absorber from the frame (see Rear Shock Absorber Removal).
Loosen the locknut and turn out the adjusting nut to free the spring.

Special Tools - Hook Wrench T=3.2 R37: 57001-1539 Hook Wrench R=35: 57001-1580

To adjust the spring preload, turn in the adjusting nut [A] to the desired position and tighten the locknut [B].

Spring Length [C]

Spring Preload Setting Standard: Spring length 162 mm (6.38 in.) Usable Range: Spring length 157
170 mm (6.18
6.69 in.)

Spring Preload Adjustment

Remove the bolts [A] and rear footpeg bracket [B] (both sides) for easily adjustment.

Spring Preload Adjustment

To adjust the spring preload, turn in the adjusting nut to the desired position and tighten the locknut by using hook wrenches [A] with the rear shock absorber attached the frame.

Special Tools - Hook Wrench T=3.2 R37: 57001-1539 Hook Wrench R=35: 57001-1580

If the spring action feels too soft or too stiff, adjust it.

Spring Preload Adjustment

Spring Adjustment

Compression Damping Force Adjustment

There are two adjustments you can make to the compression damping force. High Speed Compression Damping Adjuster [A] Low Speed Compression Damping Adjuster [B] To adjust the high speed co ...

Rear Shock Absorber Removal

Remove: Lower Fairings (see Lower Fairing Removal in the Frame chapter) Fuel Tank (see Fuel Tank Removal in the Fuel System chapter) Bolts [A] (Both Sides) Foot Guard [B] (Both Sides) ...

Other materials:

Fuel Reserve Switch Inspection
Fill the fuel tank with fuel and close the fuel tank cap. Remove the front seat (see Front Seat Removal in the Frame chapter). Disconnect the fuel pump lead connector [A]. Connect the test light [A] (12 V 3.4 W bulb in a socket with leads) and the 12 V battery [B] to the fuel pu ...

Air Cleaner
A clogged air cleaner restricts the engine’s air intake, increasing fuel consumption, reducing engine power, and causing spark plug fouling. This motorcycle’s air cleaner element consists of a wet paper filter, which cannot be cleaned. The air cleaner element must be replaced in acco ...

Piston Ring End Gap Inspection
Place the piston ring [A] inside the cylinder (upper crankcase), using the piston to locate the ring squarely in place. Set it close to the bottom of the cylinder, where cylinder wear is low. Measure the gap [B] between the ends of the ring with a thickness gauge. Piston Ring End Gap ...