Transmission/Crankshaft Service Information; Transmission/Crankshaft Troubleshooting; Transmission/Crankshaft Specifications; Transmission/Crankshaft Tools - Honda TRX70 Fourtrax 1986 Service Manual

10. TRANSM ISSION/CRANKSHAFT
SERVICE INFORMATION
TROUBLESHOOTING
CRANKCASE SEPARATION
SERVICE INFORMATION
GENERAL
10-1
10-1
10-2
CRANKSHAFT
TRANSMISSION
CRAN KCASE ASSEMBLY
10-2
10-4
10-7
• Transmission/ crankshaft maintenance and inspection must be performed after engine remo ving from frame (Sect ion 51.
• The crankcase must be separated to service the c rankshaft and tran smission components.
• The fo llowing parts must be remov ed before separating the crankcase .
- Cylinder head Section 6
- Cylinder and piston Section 7
- Clutch Section 8
- Gearshift linkage
- Recoil starter
- A lternator
- Cam chain tensioner
SPECIFICATI ONS
ITEM
Section 8
Section 9
Section 9
Section 9
STANDARD
Transmission
Ge ar 1.0. M2, M4 , C3
17.016 - 17.043 (0.6699 - 0.67 10)
e1
20.020 - 20.053 (O.7882 - 0 .7895)
e1
bushing 1.0. 1 7.000 - 1 7 .018 (0 .6693 - 0 .61001
C1 bushing 0 .0.
19 .979-20.000 (0 .1866- 0 .1874)
Mainshaft
0.0 .
16.983 - 16.994 10.6686 - 0 .669 1)
Countershaft 0 .0 .
16.966 - 16 .984 (0.6680 - 0 .6681)
Shift drum 0 .0 . 33.950 -33 .915 (1.3366 - 1.3376)
Shift f ork
1.0.
34 .000 - 34.02511 .3386 - 1.3396)
Shift fo rk craw thickness 4 .86 - 4.94 (0. 191 - 0 . 195)
Crankshaft Connecting rod big end
0 . 10 - 0.35(0.004 - 0.0 14)
side clearance
Connecting rod big end
0 - 0 .012 10 - 0 .0005)
radial clearance
Runout
--
TOOLS
Co mmon
Attachment, 37
x
40 mm
Pilot, 17 mm
Driver
01746 - 0010200
01746 - 0040400
01749 - 00 10000
Driver. 22 mm 1 .0 .
Attachment, 20 mm
1.0.
TROUBLESHOOTING
Hard to shift
Improper clutch adjustment
Bent shift fork
Bent shift drum stopper arm
Excessive noise
Excessive crankshaft bearing play
• Excessive connecting rod big end bearing play
Transmission jumps out of gear
Worn gear dogs
Bent shift forks
Broken shift drum stopper
mmlin)
SERVICE LIMIT
17. 1010.673)
20. 10 (0. 791)
11.04 (0.61 1)
19.63 (0.173)
16.95 (0.667)
16 .95 (0.667)
33 .93 (1.336)
34 .071 1.3411
4 .6 (0. 18)
0.6 (0.02)
0 .05 (0.<)Q2)
0 . 1010.004)
01746-0020 100
07746 - 0020400
10-1