Honda GL1800 Service Manual page 340

Measure the gear I.D.
SERVICE LIMITS:
M4: 31.04 mm (1.222 in)
M5: 35.04 mm (1.380 in)
C2, C3: 33.04 mm (1.301 in)
Measure the gear bushing O.D.
SERVICE LIMITS:
M4: 30.93 mm (1.218 in)
M5: 34.93 mm (1.375 in)
C2, C3: 32.93 mm (1.296 in)
Calculate the gear-to-bushing clearance.
SERVICE LIMITS: 0.10 mm (0.004 in)
Measure the gear bushing I.D.
SERVICE LIMITS:
M4: 28.04 mm (1.104 in)
M5: 32.04 mm (1.261 in)
Check the mainshaft and countershaft for abnormal
wear or damage.
Measure the mainshaft O.D. at the M4 and M5
gears.
SERVICE LIMITS:
M4: 27.96 mm (1.101 in)
M5: 31.96 mm (1.258 in)
Calculate the gear bushing-to-shaft clearance.
SERVICE LIMIT: 0.08 mm (0.003 in)
Turn the ball bearing race with your finger. The
bearing should turn smoothly and quietly.
Replace the bearing if the race does not turn
smoothly or quietly.
GEARSHIFT LINKAGE/TRANSMISSION
5
4
10-31