Honda 2007 CRF250R, Owner'S Manual

Page: 90 / 165

Servicing Your Honda
85
Drive Chain
(1) upper drive chain roller (3) “
/ /
” mark
(2) lower drive chain roller
(1) rear axle nut (4) index mark
(2) lock nut (5) axle plate
(3) adjusting bolt (6) reference mark
3. Tighten the rear axle nut to the specified
torque:
94 lbf·ft (128 N·m, 13.1 kgf·m)
4. Recheck chain slack and adjust as necessary.
5. Loosen the adjusting bolt counterclockwise
lightly until it touches the axle plate. Then,
while holding the adjusting bolt with a
wrench, tighten the lock nut to the specified
torque:
20 lbf·ft (27 N·m, 2.8 kgf·m)
(3)
(2)
(1)
(6)
(5)
(2)
(3)
(1)
(4)
Lubrication
Commercially prepared drive chain lubricants
may be purchased at most motorcycle shops and
should be used in preference to motor oil. Pro
Honda HP Chain Lube or an equivalent, or SAE
80 or 90 gear oil is recommended.
Saturate each chain joint so that the lubricant
penetrates the space between adjacent surfaces of
the link plates and rollers.
Adjustment
1. Loosen the rear axle nut (1).
2. Loosen both lock nuts (2) and turn the
adjusting bolts (3) counterclockwise to
decrease slack or clockwise to increase slack.
Align the index marks (4) of the axle plates
(5) with the same reference marks (6) on both
sides of the swingarm.
Drive Chain Rollers
1. Check the upper drive chain roller (1) and
lower drive chain roller (2) for wear or
damage.
2. Measure the diameter of the drive chain
rollers and replace them if below the service
limit.
Service Limit:
Upper roller:
1.5 in (39 mm)
Lower roller:
1.2 in (31 mm)
Replace the roller if necessary as follows.
Install the upper drive chain roller (Green) with
the “
/
” mark (3) facing toward the frame and
lower drive chain rollar (Black) as shown.
Tighten the drive chain roller bolt and nut to the
specified torque:
Upper roller bolt:
9 lbf·ft (12 N·m, 1.2 kgf·m)
Lower roller nut: 9 lbf·ft (12 N·m, 1.2 kgf·m)
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