Drive/Driven Sprocket; Drive Chain Roller (After '11) - Honda 2010 CRF250R Service Manual

MAINTENANCE
Upper: Green
Inslalilhe drive chain rollers wi th the "_" mark facing
Lower: Black
out.
Install and l ighten the drive chain roller boll and nut to
the specified torque.
TORQUE :
Drive chain upper roller bolt:
12 N'm (1 .2 kgf-m, 9lbHt)
Drive chain lower roller nut:
12 N'm (1 .2 kgf-m, 9lbHt)
DRIVE CHAIN ROLLER (After '11)
Inspect the drive chain rollers for excessive wear or
binding.
Measure the upper and lower drive ch ain rollers O.D .
SERVICE LIMIT :
Upper: 39 mm (1.5 in)
Lower: 31 mm (1.2 in)
Replace the drive chain roller if necessary.
Install the drive chain upper roller with the "_" mark
facing out.
Install the drive chain lower roller as shown.
Install and tighten the drive chain roller bolt and nut to
the specified torque.
TORQUE:
Drive chain upper roller bolt:
12 N·m (1 .2 kgf'm, 9 IbHt)
Drive chain lower roller nut:
12 N'm (1 .2 kgf'm , 9 IbUt)
DRIVE/DRIVEN SPROCKET
3-22
Inspect the drive and driven sprocket teeth for wear or
damage, replace them
if
necessary.
Never use a new drive chain on worn sprockets.
Both chain and sprockets must be in good condition, or
the new repl acement ch ain will wear rapidly.
CHAIN ROLLERS
-(:~~::~
~~
MARK
~B
SIDE m
UPPER ROLLER MARK LOWER ROLLER
\ ~
I
NORMAL