Suzuki RM250 - Exhaust Silencer; Drive Chain and Sprockets; Drive Chain Slack; Drive Chain Adjustment

2-16 PERIODIC MAINTENANCE
EXHAUST SILENCER
• Remove the seat and the right frame cover.
• Remove the silencer.
• Remove bolts and extract the black frontal part from the alu-
minum case.
• Check if the glasswool silencer is clogged with carbon deposit
or tar.
• Replace the glasswool silencer with new one if necessary.
NOTE:
To seal between the frontal part and the aluminum case, apply
SUZUKI BOND to the contact area of the frontal part.
99000-31140: SUZUKI BOND “1207B”
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 axle nut 1.
• Loosen lock-nut 2 and adjust the drive chain slack to the
specification by turning adjuster 3.
• Check that both right and left alignment marks 4 are at the
same position.
• Tighten the lock-nut 2 securely.
• Tighten the axle nut 1.
 Axle nut: 100 N·m (10.0 kgf-m, 72.5 lb-ft)
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.
40 – 50 mm
(1.6 – 2.0 in)