Suzuki LT-Z250 Service Manual page 98

3-56 ENGINE
TOOTH CONTACT
After backlash adjustment is carried out, the tooth contact must
be checked. Pay attention to the following procedures:
Remove the driven bevel gear.
Clean and degrease several teeth of the drive and driven
bevel gears.
Apply a coating of machinist s layout dye or paste to several
teeth of the driven bevel gear.
Install the driven bevel gear.
Rotate the driven bevel gear several turns in both directions.
Remove the driven bevel gear and inspect the coated teeth of
the drive bevel gear. The tooth contact pattern should be as
shown in 1, 2 and 3.
If tooth contact is found to be correct (example 2), go to the
ENGINE REASSEMBLY section on page 3-59 to complete
installation.
1 Incorrect (contact at tooth top)
2 Correct
3 Incorrect (contact at tooth root)
If tooth contact is found to be incorrect (examples 1 and 3),
the shim thickness between the drive bevel gear and driven
bevel gear must be changed and the tooth contact rechecked
until correct.
'
Make sure to check the backlash after the tooth con-
tact has been adjusted, since it may have changed.
Adjust the tooth contact and backlash until they are
both within specification. If the correct tooth contact
cannot be maintained when adjusting the backlash,
replace the drive and driven bevel gears.
Tooth contact
Contact at tooth top 1
Contact at tooth root 3
Drive bevel gear shim adjustment Driven bevel gear shim adjustment
Increase shim thickness
Decrease shim thickness
!
Increase shim thickness
Decrease shim thickness