Suzuki RM125 - 2-16 Periodic Maintenance; Drive Chain and Sprockets; Drive Chain Slack; Drive Chain Adjustment

2-16 PERIODIC MAINTENANCE
DRIVE CHAIN AND SPROCKETS
DRIVE CHAIN SLACK
• Place the motorcycle on the side stand.
• Inspect the drive chain slack at the middle point between the
drive chain buffer and rear sprocket.
 Drive chain slack: 40 – 50 mm (1.6 – 2.0 in)
DRIVE CHAIN ADJUSTMENT
• Loosen the axle nut 1.
• Loosen the lock-nuts 2 and adjust the drive chain slack to the
specification by turning the adjusters 3. Make sure that the
right and left adjuster plates 4 are at the same position on
scales 5.
• With the adjusters 3 held in position, tighten the lock-nuts 2.
• Push the adjuster plates 4 to the adjusters 3 and tighten the
axle nut 1.
 Axle nut: 100 N·m (10.0 kgf-m, 72.5 lb-ft)
• Tighten the lock-nuts 2.
NOTE:
Pull the upper drive chain tight and lock it by placing a bar
between the drive chain and rear sprocket while tightening the
axle nut. This will help prevent the chain adjusters from loosen-
ing.
20TH PITCH LENGTH
• Pull the drive chain tight and measure the 20th pitch length.
 Service Limit: 323.8 mm (12.7 in)
DRIVE CHAIN LUBRICATION
• Remove the chain clip and master link from the drive chain
and remove the drive chain.
NOTE:
Be careful not to bend the chain clip.
• Inspect for wear and damage of the drive chain and replace it
if necessary.
0 – 50 mm