7. CLUTCH/GEARSHIFT LINKAGE

Page 7-0


really big verson

Page 7-1

SERVICE INFORMATION

GENERAL

SPECIFICATIONS

Unit: mm (in)
ITEMSTANDARDSERVICE LIMIT
ClutchSpring free length44.4 (1.75)42.8 (1.69)
Spring preload/length22.75/26.2 kg/mm
(50.15/1.031 lb/in)
---
Disk ThicknessDisk A2.92-3.08 (0.115-0.121)2.60 (0.102)
Disk B2.62-2.78 (0.103-0.109)2.30 (0.091)
Plate Warpage---0.30 (0.012)
Outer guideI.D.21.991-22.016 (0.8658-0.8668)22.09 (0.870)
O.D.31.959-31.975 (1.2582-1.2589)31.92 (1.257)
Outer I.D.32.000-32.025 (1.2598-1.2608)32.10 (1.264)
Oil pump drive sprocked I.D.32.000-32.025 (1.2598-1.2608)32.10 (1.264)
Mainshaft O.D at clutch outer guide21.967-21.980 (0.8648-0.8654)21.92 (0.863)

TORQUE VALUES

Shift drum stopper plate bolt26 N.m (2.6 kg-m, 19 ft-lb) Apply locking agent to the threads
Primary drive gear bolt90 N.m (9.0 kg-m, 65 ft-lb)
Oil pump driven sprocket bolt15 N.m (1.5 kg-m, 11 ft-lb) Apply locking agent to the threads
Cluch lock nut130 N.m (13.0 kg-m, 94 ft-lb) Staked nut
Oil pass pipe bolt
                (8mm)
                (7mm)

23 N.m (2.3 kg-m, 17 ft-lb)
10 N.m (1.0 kg-m, 7.2 ft-lb)

Page 7-3


RIGHT CRANKCASE COVER REMOVAL

Drain the engine oil (page 2-3).
Remove the exhaust pipe.
Remove the clutch cable holder and disconnect the clutch cable from the clutch lifter arm.
Loosen the oil pipe holder and remove the oil pipe bolt and sealing washers from the right crankcase cover.

Remove the right crankcase cover bolts and cover.

NOTE



Remove the dowel pins and gasket.

Remove the oil orifice.

CLUTCH LIFTER

Remove the clutch lifter piece, and remove the snap ring and return spring from the right crankcase cover.

Remove the clutch lifter shaft.

Check the clutch lifter piece and shaft for damage or excessive scratching.
Check the return spring for fatigue or damage.

Page 7-4


Check the needle bearings for wear or damage or a loose fit in the cover.
Check the dust seal for fatigue or damage.

Apply grease to the dust seal and needle bearing.

Install the clutch lifter shaft, snap ring and return spring.
Hook the spring end in the cover tab securely, and turn the shaft.

Install the clutch lifter piece, aligning the piece end with the groove in the clutch lifter shaft.

CLUTCH REMOVAL

Remove the following: NOTE



Unstake the clutch lock nut with a drill or grinder. NOTE


Page 7-5


Hold the clutch center with the special tool and loosen the clutch lock nut. Remove the tools and the lock nut.

TOOLS:


Clutch center holder           07923-KE10000 or
                               07HGB-001000A
                               (U.S.A. only)
Lock nut wrench, 17 x 27 mm    07716-0020300 
                               Equivalent commercially 
                               available in U.S.A. 

NOTE



Remove the following:


Remove the thrust washer and clutch outer.

Remove the oil pump driven sprocket mounting bolt, driven sprocket and oil pump drive chain.

Page 7-6


Remove the drive sprocket and clutch outer guide from the mainshaft.

INSPECTION

Check the lifter plate bearing for damage.
Turn the bearing inner race with your finger.
The bearing should turn smoothly and quietly.
Also check that the bearing outer race fits tightly in the clutch lifter plate.
Replace the bearing if necessary.

Measure the spring free length.

SERVICE LIMIT: 42.8 mm (1.69 in)


Replace the clutch discs if they show signs of scoring or discoloration.

Measure the thickness of discs A and B.

SERVICE LIMITS:
    Disc A: 2.60 mm (0.102 in)
    Disc B: 2.30 mm (0.091 in)

NOTE



Page 7-7


Check the plate warpage on a surface plate using a thickness gauge.

SERVICE LIMIT: 0.30 mm (0.012 in)

NOTE



Check the clutch center for nicks or indentations made by the clutch plates.

Check the spring seat and judder spring for distortion, wear or damage.
Replace them if necessary.

Check the slots in the clutch outer for nicks or indentations made by the clutch discs.

Measure the l.D. of the clutch outer.

SERVICE LIMIT:
   Clutch outer l.D. 32.10 mm (1.264 in)

Page 7-8


Check the oil pump drive sprocket for damage.

Measure l.D of the drive sprocket and the O.D. and l.D. of the
outer guide.

SERVICE LIMITS:
Oil pump drive sprocket l.D.  32.10 mm (1.264 in)
Clutch outer guide O.D.  31.92 mm (1.257 in)
I.D.  22.09 mm (0.870 in)

Measure the mainshaft O.D. at the clutch outer guide.

SERVICE LIMIT: 21.92 mm (0.863 in)

GEARSHIFT LINKAGE

REMOVAL

Remove the following:

Loosen the two oil pipe stay mounting bolts and remove the oil
pipe mounting bolt.

Pull the oil pipe out of the stay and oil pump.


Page 7-9


Remove the following:

INSPECTION

Check the gearshift spindle for bending or damage.
Check the return spring for fatigue or damage.

INSTALLATION

Install the collar, spring, stopper arm,
washer and stopper arm bolt and tighten the bolt.

Install the dowel pins into the holes of the gearshift drum.

Lift up the drum stopper arm and install the drum stopper plate.

Apply locking agent to the threads of the stopper plate bolt and tighten the bolt.

TORQUE: 26 N.m (2.6 kg-m, 19 ft-lb)

Install the gearshift spindle, aligning the return spring ends with the pin in the case.

Page 7-10


Install the oil pipe with a new O-ring onto the oil pipe stay and oil pump.

Tighten the bolts securely.

Install the removed parts in the reverse order of removal.

Install the gearshift arm to the gearshift spindle.

Align the punch mark on the arm with the punch mark on the spindle.

Tighten the gearshift arm pinch bolt.

TORQUE: 12 N.m (1.2 kg-m, 9 ft-lb)

Install the drive sprocket cover.

PRIMARY DRIVE GEAR

REMOVAL

Remove the following: Remove the pulse generator mounting bolts and pulse generators.

Temporarily install the clutch outer, then install the gear holder as shown.

TOOL:
Gear holder 07724 - 0010100 Not available in U.S.A.

Remove the following:


Page 7-11


INSTALLATION

Install the primary drive gear with the "OUT" mark facing out.

NOTE


Install the pulse generator rotor.

Temporarily install the clutch outer and install the gear holder as shown. TOOL:
Gear holder 07724 - 0010100 Not available in U.S.A.

Install the washer and bolt and tighten the bolt.

TORQUE: 90 N m (9.0 kg-m, 65 ft-lb)

Remove the gear holder and clutch outer.

Install the following:

NOTE



CLUTCH INSTALLATION

Apply MoS2 paste grease to the outside of the clutch outer guide and install the oil pump drive sprocket over the outer guide.

Page 7-12


Install the oil pump drive chain on the drive sprocket.

Install the oil pump driven sprocket with the "IN" mark facing inside.

Guide the drive chain over the sprocket.

Apply locking agent to the threads of the driven sprocket mounting bolt and tighten it with the washer to the specified torque.

TORQUE: 15 N.m (1.5 kg-m, 11 ft-lb)

Align the grooves in the clutch outer with the bosses on the oil pump drive sprocket while turning the sprocket with the chain and pushing the clutch outer onto the shaft.

Install the thrust washer onto the mainshaft.

Page 7-13


Install the pressure plate, clutch discs B, plates and disc A in the clutch outer.

NOTE


Install the spring seat and judder spring on the clutch center as shown.
Install them in the clutch outer.

NOTE


Install the washer on the mainshaft.

Hold the clutch center with the clutch center holder, and tighten the lock nut to the specified torque.

TORQUE: 130 N.m (13.0 kg-m, 94 ft-lb)

TOOLS:
Clutch center holder 07923-KE10000 or
07HGB-001000A (U.S.A. only)
Lock nut wrench, 17 x 27 mm  07716-0020300 Equivalent commercially available in U.S.A.

Stake the lock nut with a center punch.

Page 7-14


Install the clutch springs, lifter plate and bolts.
Tighten the bolts in a crisscross pattern in 2 or 3 steps.

NOTE


Install the bearing into the lifter plate.

RIGHT CRANKCASE COVER

INSTALLATION

Check the oil orifice for clogging.
Install a new O-ring on the oil orifice.
Install the oil orifice with its smaller hole facing in.

Install the dowel pins and new gasket.


Tighten the right crankcase cover mounting bolts in a crisscross pattern in 2 or 3 steps and install the clutch cable holder and oil pipe holder at the same time.

Connect the clutch cable to the clutch lifter arm.

Tighten the oil pipe bolt with the new sealing washers.

TORQUE: 23 N.m (2.3 kg-m, 17 ft-lb)

Install the exhaust pipe.

TORQUE:
Exhaust pipe joint nut:27 N.m (2.7 kg-m, 20 ft-lb)
Muffler band bolt: 27 N.m (2.7 kg-m, 20 ft-lb)

Fill the crankcase with engine oil (page 2-3).
Adjust the clutch lever free play (page 3-15).