Honda CRF150R 2020 Owner's Manual & Competition Handbook page 89

Drive Chain Rollers
1. Check the drive chain roller (1) for wear or
damage.
2. Measure the outer diameter of the drive chain
roller and replace it if below the service limit.
Service Limit: 0.7 in (18 mm)
Replace the roller if necessary as follows.
Remove the bolt (2), washers (3), collar (4) and
drive chain roller.
Install a new drive chain roller, collar, washers and
tighten the bolt.
(1)
(2)
(1)
(4)
(1) drive chain roller (3) washers
(2) bolt (4) collar
Adjustment
1. Loosen the rear axle nut (1).
2. Loosen both chain adjuster 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.
(3)
(2)
(1)
(5)
(3)
(1) rear axle nut
(2) chain adjuster lock nut
(3) adjusting bolt
3. Tighten the rear axle nut to the specified
torque:
65 lbf·ft (88 N·m, 9.0 kgf·m)
4. Recheck chain slack and adjust as necessary.
5. Turn the adjusting bolts counterclockwise until
it touches the axle plates lightly. Then tighten
the chain adjuster lock nut to the specified
torque while holding the adjusting bolt with a
wrench:
20 lbf·ft (27 N·m, 2.8 kgf·m)
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 is recommended.
Saturate each chain joint so that the lubricant
penetrates the space between adjacent surfaces of
the link plates and rollers.
(4)
(6)
(4) index mark
(5) axle plate
(6) reference mark
Drive Chain
Lubrication
Servicing Your Honda
83