FORK. Honda CBR125R

FRONT WHEEL/SUSPENSION/STEERING

Install the side collar into the right wheel hub.

SIDE COLLAR

When installing the front wheel, align the following:

– Brake disc between the brake pads

– Speedometer gear box groove with the boss on the left fork leg

Be careful not to damage the brake pads.

Apply a thin coat of grease to the axle rolling surface.

Install the axle from right side.

Install and tighten the axle nut to the specified torque.

TORQUE: 59 N·m (6.0 kgf·m, 44 lbf·ft)

Connect the speedometer cable to the speedometer gear box by aligning the tab of the cable with the hole of the gear box.

Align

AXLE

GEAR BOX

FORK

REMOVAL

Remove the following:

– Front fender (page 2-11)

– Front wheel (page 13-13)

Do not suspend the brake caliper/ bracket assembly from the brake hose. Do not twist the brake hose.

Remove the brake caliper mounting bolts and brake caliper/bracket assembly.

NUT SPEEDOMETER CABLE

CALIPER/BRACKET ASSEMBLY

BOLTS

13-18

LEFT SIDE: Remove the wire band from the fork pipe.

FRONT WHEEL/SUSPENSION/STEERING

Remove the stopper rings from both fork pipes.

Loosen the handlebar pinch bolts and remove the handlebars.

When the fork is ready to be disassembled, loosen the fork bolt.

Loosen the top bridge pinch bolts.

WIRE BAND

FORK BOLT

Hold the fork leg and loosen the bottom bridge pinch bolt and lower the fork leg, then remove it.

STOPPER RING BOLTS

DISASSEMBLY

Remove the following:

– Fork bolt

– O-ring

– Spring collar

– Spring seat

BOLT

FORK BOLT COLLAR

O-RING SEAT

13-19

FRONT WHEEL/SUSPENSION/STEERING

Remove the fork spring.

Drain the fork fluid by pumping the fork pipe several times.

SPRING

Do not over-tighten the vise on the fork slider.

Set the fork slider in a vise with a piece of wood or soft jaws to avoid damage.

FORK SLIDER

If the fork piston turns with the socket bolt, temporarily install the fork spring, spring seat, spring collar and fork cap.

Remove the fork socket bolt and sealing washer.

Remove the fork pipe and oil lock piece from the fork slider.

BOLT/SEALING WASHER

FORK SLIDER

FORK PIPE

OIL LOCK PIECE

Do not remove the piston ring unless it is to replace with a new one.

Remove the fork piston and rebound spring from the fork pipe.

FORK PISTON FORK PIPE

REBOUND SPRING

13-20

Be careful not to scratch the fork pipe.

Remove the dust seal and stopper ring.

FRONT WHEEL/SUSPENSION/STEERING

DUST SEAL STOPPER RING

Be careful not to damage the fork slider.

Remove the oil seal using a special tool.

TOOL:

Oil seal remover 07748-0010001 or equivalent commercially available

INSPECTION

FORK SPRING

Check the fork spring for fatigue or damage.

Measure the fork spring free length.

SERVICE LIMIT: 404.1 mm (15.91 in)

OIL SEAL

OIL SEAL REMOVER

FORK PIPE/SLIDER/PISTON

Check the fork pipe, slider and for score marks, scratches, or excessive or abnormal wear.

Check the slider bushing for wear or damage.

FORK SLIDER

FORK PIPE

BUSHING

13-21

FRONT WHEEL/SUSPENSION/STEERING

Check the fork piston and piston ring for wear or damage.

Check the rebound spring for fatigue or damage.

Replace any components that are worn or damage.

PISTON RING FORK PISTON

REBOUND SPRING

Place the fork pipe on V-blocks.

Turn the fork pipe and measure the runout using a dial indicator.

Actual runout is 1/2 of the total indicator reading.

SERVICE LIMIT: 0.20 mm (0.008 in)

DUST SEAL

STOPPER RING

ASSEMBLY

FORK PIPE

OIL SEAL

SLIDER BUSHING

FORK SLIDER

FORK PISTON RING 23 N·m (2.3 kgf·m, 17 lbf·ft)

O-RING

FORK

PISTON

SPRING

COLLAR

SPRING SEAT

FORK SPRING

SEALING

WASHER

REBOUND SPRING

OIL LOCK

PIECE

20 N·m (2.0 kgf·m, 15 lbf·ft)

13-22

FRONT WHEEL/SUSPENSION/STEERING

Before assembly, wash all parts with a high flash or non-flammable solvent and wipe them dry.

Apply fork fluid to a new oil seal lips, then install it into the fork slider with its marking facing up.

Drive in the oil seal into the fork slider until the stopper ring groove is visible, using the special tools.

TOOLS:

Driver

Attachment, 42 x 47 mm

07749-0010000

07746-0010300

OIL SEAL DRIVER

FORK SLIDER

Install the stopper ring into the groove of the fork slider securely.

Install a new dust seal.

STOPPER RING

ATTACHMENT

DUST SEAL

Install the rebound spring to the fork piston and install them into the fork pipe.

FORK PISTON FORK PIPE

Install the oil lock piece onto the fork piston end.

Install the fork pipe into the fork slider.

REBOUND SPRING

FORK PIPE

OIL LOCK PIECE

FORK SLIDER

13-23

FRONT WHEEL/SUSPENSION/STEERING

Do not over-tighten the vise on the fork slider.

Set the fork slider in a vise with a piece of wood or soft jaws to avoid damage.

Install a new sealing washer to the fork socket bolt.

Apply locking agent to the fork socket bolt threads and install it.

SEALING WASHER

BOLT

If the fork piston turns with the socket bolt, temporarily install the fork spring, spring seat, spring collar and fork bolt.

Tighten the fork socket bolt to the specified torque.

TORQUE: 20 N·m (2.0 kgf·m, 15 lbf·ft)

BOLT

Pour the specified amount of recommended fork fluid into the fork pipe.

RECOMMENDED FORK FLUID (Except CM type):

Honda ULTRA CUSHION OIL 10W or equivalent

RECOMMENDED FORK FLUID (CM type only):

Pro Honda Suspension Fluid SS-8 (10W) or equivalent

FORK FLUID CAPACITY:

206 ± 2.5 cm 2 (7.0

± 0.08 US oz, 7.3

± 0.09 Imp oz)

Slowly pump the fork pipe several times to remove any trapped air from the lower portion of the fork pipe.

Compress the fork pipe fully and measure the fluid level from the top of the fork pipe.

FLUID LEVEL: 131 mm (5.2 in)

Pull the fork pipe up and install the fork spring with the tightly wound coil side facing down.

Install the spring seat and spring collar.

COLLAR

SEAT

SPRING

131 mm

(5.2 in)

DOWN

13-24

FRONT WHEEL/SUSPENSION/STEERING

Tighten the fork bolt after installing the fork pipe into the fork bridges.

Apply fork fluid to a new O-ring and install it onto the fork bolt.

Loosely install the fork bolt by pushing it to the fork pipe.

O-RING FORK BOLT

Route the wires and cables properly

(page 1-18).

INSTALLATION

Install the fork leg through the bottom bridge and top bridge so that the height from the top bridge upper surface to the fork pipe end is 32 mm (1.3 in).

FORK PIPE

32 mm

(1.3 in)

Tighten the bottom bridge and top bridge pinch bolts to the specified torque.

TORQUE:

Bottom bridge pinch bolt:

27 N·m (2.8 kgf·m, 20 lbf·ft)

Top bridge pinch bolt:

23 N·m (2.3 kgf·m, 17 lbf·ft)

TOP BRIDGE

BOTTOM BRIDGE

PINCH BOLT

If the fork bolt is loosened, tighten the fork bolt to the specified torque.

TORQUE: 23 N·m (2.3 kgf·m, 17 lbf·ft)

FORK BOLT

FORK PIPE

TOP BRIDGE

PINCH BOLT

13-25

FRONT WHEEL/SUSPENSION/STEERING

Install the handlebars to both fork pipes while aligning the bosses on the handlebars with the cut outs on the top bridge.

Align

Tighten both handlebar pinch bolts to the specified torque.

TORQUE: 27 N·m (2.8 kgf·m, 20 lbf·ft)

Install the stopper rings to the grooves of both fork pipes.

LEFT SIDE: Install the wire band to the fork pipe.

Route the wire properly (page 1-18).

STOPPER RING

Install the brake caliper/bracket assembly and tighten new brake caliper mounting bolts to the specified torque.

TORQUE: 30 N·m (3.1 kgf·m, 22 lbf·ft)

Install the following:

– Front wheel (page 13-17)

– Front fender (page 2-11)

WIRE BAND

CALIPER/BRACKET ASSEMBLY

BOLTS

BOLT

13-26