2013 YAMAHA GRIZZLY 125 Owners Manual

8-26
8
EBU24000Adjusting the engine idling speed The engine idling speed must be checked and, if
necessary, adjusted as follows at the intervals
specified in the periodic maintenance and lubrica-
tion chart.TIPA diagnostic tachometer is needed to make this
adjustment.1. Start the engine and warm it up.TIPThe engine is warm when it quickly responds to the
throttle.2. Attach the tachometer to the spark plug lead.
3. Check the engine idling speed and, if neces-sary, adjust it to specification by turning the
throttle stop screw at the carburetor. To in-
crease the engine idling speed, turn the throt-
tle stop screw in direction (a), and to decrease
it, turn the screw in direction (b).
TIPIf the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.EBU24047Adjusting the throttle lever free play The throttle lever free play should be checked and,
if necessary, adjusted at the intervals specified in
the periodic maintenance and lubrication chart.1. Throttle stop screwEngine idling speed:1650–1750 r/min
(a) (b)
1
U1PY61E0.book Page 26 Wednesday, March 14, 2012 5:22 PM

8-27
8The throttle lever free play should measure 1.0–
3.0 mm (0.04–0.12 in) as shown. Periodically
check the throttle lever free play and, if necessary,
adjust it as follows.
TIPThe engine idling speed must be checked, and ad-
justed if necessary, before adjusting the throttle le-
ver free play.1. Slide the rubber cover back.
2. Loosen the locknut.
3. To increase the throttle lever free play, turn
the throttle lever free play adjusting bolt in di-
rection (a). To decrease the throttle lever free
play, turn the adjusting bolt in direction (b). 4. Tighten the locknut.
5. Slide the rubber cover to its original position.
EBU24060Valve clearance The valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
brication chart.1. Rubber cover
2. Throttle lever free play adjusting bolt
3. Locknut
4. Throttle lever free play
4
3
2
1
(a)
(b)
U1PY61E0.book Page 27 Wednesday, March 14, 2012 5:22 PM

8-28
8
EBU29601Brakes Replacement of brake components requires pro-
fessional knowledge. Brake service should be per-
formed by a Yamaha dealer.
WARNING
EWB02571Operating with improperly serviced or adjust-
ed brakes could lead to a loss in braking ability
and an accident.EBU24090Checking the front and rear brake
shoes The front and rear brake shoes must be checked
for wear at the intervals specified in the periodic
maintenance and lubrication chart. Each brake is
provided with a wear indicator, which allows you to
check the brake shoe wear without having to dis-
assemble the brake. To check the brake shoe
wear, check the position of the wear indicator while
applying the brake. If a brake shoe has worn to the
point that the wear indicator reaches the wear limit
line or mark, have a Yamaha dealer replace the
brake shoes as a set.Front brake
1. Wear limit line
2. Wear indicator
1
2
U1PY61E0.book Page 28 Wednesday, March 14, 2012 5:22 PM

8-29
8Rear brake
EBU24374Adjusting the front
brake lever free
play The brake lever free play must be checked and, if
necessary, adjusted at the intervals specified in the
periodic maintenance and lubrication chart.TIPBefore adjusting the brake lever free play, check
the front brake shoes for wear.
The brake lever free play should measure 5.0–8.0
mm (0.20–0.31 in) as shown. If the free play is in-
correct, adjust it as follows.
1. Remove the front carrier by removing the bolts.
1. Wear limit line
2. Wear indicator
1
2
1. Brake lever free play
1
U1PY61E0.book Page 29 Wednesday, March 14, 2012 5:22 PM

8-30
8
2. Remove the panel by removing the quick fas-
teners, and then pulling it upward as shown. 3. Disconnect the coupler shown.
1. Front carrier
2. Front carrier bolt
1
2 2
2
1. Panel
2. Quick fastener
1. Coupler
12
2
1
1
U1PY61E0.book Page 30 Wednesday, March 14, 2012 5:22 PM

8-31
84. Remove the V-belt air filter element cover by
removing the screw.
5. Loosen the locknut and fully turn in the brake lever free play adjusting bolt at the brake le-
ver. 6. Make sure the brake cable joint in the equaliz-
er is straight when the brake is applied. If the
cable joint isn’t straight, loosen the locknuts,
and then turn the adjusting nuts on the front
brake cables until the cable joint becomes
straight.
1. V-belt air filter element cover
2. Screw
1 2
1. Locknut
2. Brake lever free play adjusting bolt
1
2
U1PY61E0.book Page 31 Wednesday, March 14, 2012 5:22 PM

8-32
8
7. Tighten the locknut on each brake cable.
8. Turn the brake lever free play adjusting bolt in
direction (a) to increase the free play, and in
direction (b) to decrease it.
9. Tighten the locknut at the brake lever.
10. Install the V-belt air filter element cover by in- stalling the screw.
11. Connect the coupler, and then install the pan- el by installing the quick fasteners.
12. Install the front carrier by installing the bolts, and then tighten them to the specified torque.
1. Brake equalizer
2. Cable joint
1. Locknut
2. Adjusting nut
aa '
a=a'
1
2
2
1
1
2
1. Locknut
2. Brake lever free play adjusting bolt
3. Brake lever free play
3
1
2
(b)
(a)
U1PY61E0.book Page 32 Wednesday, March 14, 2012 5:22 PM

8-33
8
EBU30440Adjusting the rear brake lever free play The brake lever free play must be checked and, if
necessary, adjusted at the intervals specified in the
periodic maintenance and lubrication chart.TIPBefore adjusting the brake lever free play, check
the rear brake shoes for wear.The brake lever free play should measure 5.0–8.0
mm (0.20–0.31 in) as shown. If the free play is in-
correct, adjust it as follows.1. Loosen the locknut.
2. Turn the brake lever free play adjusting bolt in
direction (a) to increase the free play, and in
direction (b) to decrease it.
Tightening torque:
Front carrier bolt:7 Nm (0.7 m·kgf, 5.1 ft·lbf)
1. Brake lever free play
1
U1PY61E0.book Page 33 Wednesday, March 14, 2012 5:22 PM