Checking The Front Shock Absorber Assemblies; Checking The Front Arm Ball Joints; Installing The Front Arms And Front Shock Absorber Assemblies - Yamaha 2009 YFM25RY Service Manual

FRONT ARMS AND FRONT SHOCK ABSORBER ASSEMBLIES
EAS29760
CHECKING THE FRONT SHOCK
ABSORBER ASSEMBLIES
The following procedure applies to both of the
front shock absorber assemblies.
1. Check:
• Front shock absorber assembly
Oil leaks → Replace the front shock
absorber assembly.
• Front shock absorber rod
Bends/damage → Replace the front
shock absorber assembly.
• Spring
Move the spring up and down.
Fatigue → Replace the front shock
absorber assembly.
• Gas cylinder (for 4D3H, 4D3M)
Damage/gas leaks → Replace the front
shock absorber assembly.
A. for 4D3D
B. for 4D3H, 4D3M
EAS29770

CHECKING THE FRONT ARM BALL JOINTS

The following procedure applies to each of the
front arm ball joints.
1. Check:
• Ball joint
Damage/pitting → Replace the front arm.
Free play → Replace the front arm.
Turns roughly → Replace the front arm.
EAS29790
INSTALLING THE FRONT ARMS AND
FRONT SHOCK ABSORBER ASSEMBLIES
The following procedure applies to both of the
front upper arms, front lower arms, and front
shock absorber assemblies.
1. Install:
• Front upper arm "1"
• Front lower arm "2"
• Front shock absorber assembly
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Install the front upper arm "1" and front
lower arm "2".
TIP
• Be sure to position the front upper and lower
arm bolts so that the bolt heads face forward.
• Temporarily tighten the front upper and lower
arm nuts.
b. Install the front shock absorber assembly.
Front shock absorber assembly
nut
48 Nm (4.8 m·kg, 35 ft·lb)
c. Install the steering knuckle.
Upper steering knuckle nut
25 Nm (2.5 m·kg, 18 ft·lb)
Lower steering knuckle nut
25 Nm (2.5 m·kg, 18 ft·lb)
d. Install the new cotter pins.
e. Tighten the front upper and lower arm nuts
to specification.
4-49