Page 3145 of 4264
MSG MODEL 7B-27
REVERSE IDLER GEAR AND IDLER
GEAR SHAFT CLEARANCE
1. Use a micrometer to measure the idler gear shaft diameter.
2. Use an inside dial indicator to measure the idler gear inside
diameter.
3. Calculate the idler gear and idler gear shaft clearance.
Idler gear inside diameter - idler gear shaft diameter = idle
r
gear and idler gear shaft clearance.
If the measured value exceeds the specified limit, the idle
r
gear and/or the idler gear shaft must be replaced.
Idler Gear and Idler Gear Shaft Clearance mm(in)
Standard Limit
0.041 - 0.074 (0.0016 - 0.0029) 0.150 (0.0059)
CLUTCH HUB SPLINE PLAY
1. Set a dial indicator to the clutch hub to be measured.
2. Move the clutch hub as far as possible to both the right and
the left.
Note the dial indicator reading.
It the measured value exceeds the specified limit, the
clutch hub must be replaced.
Clutch Hub Spline Play mm(in
)
Standard Limit
0.019 (0 - 0.075) 0.20 (0.0079)
Page 3146 of 4264
7B-28 MSG MODEL
BALL BEARING PLAY
Use a dial indicator to measure the ball bearing play.
Ball Bearing Play mm(in)
Limit
0.2 (0.0079)
FRONT COVER OIL SEAL
Oil Seal Replacement
Oil Seal Removal
Use a screwdriver to pry the oil seal from the front cover.
Oil Seal Installation
1. Use the oil seal installer to install the oil seal to the front
cover.
Oil Seal Installer : 5-8840-0026-0 (J-26540)
2. Apply engine oil to the oil seal lip.
REAR COVER OIL SEAL
Oil Seal Replacement
Oil Seal Removal
Use a screwdriver to pry the oil seal from the rear cover.
Oil Seal Installation
1. Use the oil seal installer to install the oil seal to the rear
cover.
Oil Seal Installer : 5-8522-0050-0 (J-29769)
2. Apply engine oil to the oil seal lip.
Page 3147 of 4264
MSG MODEL 7B-29
REASSEMBLY
MAJOR COMPONENT
INTERNAL PARTS
Reassembly steps
1. Top & main gear shaft assembly
2. Counter gear shaft assembly
3. Rev. and 5th gear assembly
4. Shift fork assembly & interlock pin
5. Detent assembly
Page 3148 of 4264
7B-30 MSG MODEL
MINOR COMPONENTS
TOP GEAR SHAFT, MAINSHAFT GEAR AND COUNTER GEAR
Reassembly Steps
1. Mainshaft
2. Needle bearing
3. 2nd gear
4. 2nd block ring
5. 1st-2nd synchronizer assembly
6. 1st block ring
7. Needle bearing collar
8. Needle bearing
9. 1st gear
10. 1st gear thrust washer
11. Mainshaft ball bearing
12. Needle bearing
13. 3rd gear
14. 3rd block ring
15. 3rd-4th synchronizer assembly
16. Mainshaft snap ring
17. Needle bearing
18. 4th block ring
19. Top gear shaft
20. Ball bearing
21. Top gear shaft snap ring
22. Counter gear
23. Front ball bearing
24. Bearing snap ring
25. Rear ball bearing
Page 3149 of 4264

MSG MODEL 7B-31
Important Operations
2. Needle Bearing
3. 2nd Gear
1) Apply the engine oil to the 2nd needle bearing and the 2nd
gear.
2) Install the needle bearing and the 2nd gear to the
mainshaft.
The dog teeth of the 2nd gear must be facing the rear side
of the transmission.
5. 1st-2nd Synchronizer Assembly
1) Apply the engine oil to the clutch hub spline.
2) Install the synchronizer assembly to the mainshaft.
The outside sleeve heavy chamfering must be facing the
rear of the transmission.
1 Chamfer Angle = 30
2 Chamfer Angle = 45
7. Needle Bearing Collar
Use a bench press and the collar installer to install the needle
bearing collar.
Collar Installer : 5-8840-0178-0 (J-33851)
8. Needle Bearing
9. 1st Gear
1) Apply the engine oil to the 1st needle bearing and the 1st
gear.
2) Install the needle bearing and the gear to the mainshaft.
The dog teeth of the 1st gear must be facing the front side
of the transmission.
10. 1st Gear Thrust Washer
Install the thrust washer to the mainshaft.
The thrust washer oil groove must be facing the 1st gear side.
Page 3150 of 4264

7B-32 MSG MODEL
11. Mainshaft Ball Bearing
1) Apply the engine oil to the ball bearing inside
circumference.
2) Use a bench press and the bearing installer to install the
bearing.
The bearing snap ring groove must be facing the front o
f
the transmission.
Bearing Installer : 5-8840-0015-0 (J-22912-01)
12. Needle Bearing
13. 3rd Gear
1) Apply the engine oil to the 3rd needle bearing and the 3rd
gear.
2) Install the needle bearing and the gear to the mainshaft.
The dog teeth of the 3rd gear must, be facing the front side
of the transmission.
15. 3rd-4th Synchronizer Assembly
1)
Apply the recommended lubricating oil to the clutch hub
spline.
2) Install the synchronizer assembly to the mainshaft.
The sleeve light chamfering
1 and the clutch hub heavy
boss
2 must be facing the rear of the transmission.
16. Mainshaft Snap Ring
1) Select the snap ring which will provide the minimum
clearance between the mainshaft and the snap ring.
There are four snap ring sizes available.
The snap rings are numbered to indicate their thickness.
Mainshaft and Snap Ring Clearance mm(in)
Standard
0 - 0.05 (0.002)
Snap Ring Availability mm(in)Thickness Identification Number
1.50 (0.059) 1
1.55 (0.061) 2
1.60 (0.063) 3
1.65 (0.065) 4
2) Use a pair of snap ring pliers to install the snap ring to the
mainshaft.
Page 3151 of 4264
MSG MODEL 7B-33
19. Top Gear Shaft
20. Ball Bearing
Use a bench press and the installer to install the ball bearing
to the top gear shaft.
The snap ring groove must be facing the front of the
transmission.
Bearing Installer : 5-8840-0015-0 (J-22912-01)
25. Rear Ball Bearing
Use a bench press and the bearing installer to install the
bearing to the counter gear.
Bearing Installer : 5-8840-0015-0 (J-22912-01)
Page 3152 of 4264
7B-34 MSG MODEL
REVERSE GEAR AND 5TH GEAR
Reassembly Steps
1. Intermediate plate
2. Reverse idler shaft
3. Bearing snap ring
4. Bearing snap ring
5. Thrust washer
6. Reverse idler gear
7. Thrust washer
8. Counter reverse gear lock nut
9. Thrust washer
10. Needle bearing collar
11. Needle bearing
12. Reverse gear
13. Rev.-5th synchronizer assembly
14. Mainshaft lock nut and washer
15. Needle bearing
16. 5th block ring
17. 5th gear
18. Thrust washer and lock ball
19. Counter reverse gear
20. Counter 5th gear
21. Counter end ball bearing
22. Counter reverse gear nut and washer
23. Thrust washer thrust ring
24. Thrust ring snap ring
25. Mainshaft end ball bearing
26. Bearing spacer
27. Speedometer drive gear and lock ball
28. Bearing snap ring