Yamaha YZ450FA Automobile User Manual


 
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CHASSIS
ADJUSTING THE FRONT FORK
COMPRESSION DAMPING FORCE
1. Adjust:
• Compression damping force
By turning the adjuster "1".
• STANDARD POSITION:
This is the position which is back by the spe-
cific number of clicks from the fully turned-in
position.
Do not force the adjuster past the minimum
or maximum extent of adjustment. The ad-
juster may be damaged.
Always adjust each front fork to the same
setting. Uneven adjustment can cause poor
handling and loss of stability.
CHECKING THE REAR SHOCK ABSORBER
1. Inspect:
• Swingarm smooth action
Abnormal noise/unsmooth action Grease
the pivoting points or repair the pivoting
points.
Damage/oil leakage Replace.
ADJUSTING THE REAR SHOCK
ABSORBER SPRING PRELOAD
1. Elevate the rear wheel by placing the suit-
able stand under the engine.
2. Measure:
• Spring fitting length
Stiffer "a" Increase the compression
damping force. (Turn the adjuster "1" in.)
Softer "b" Decrease the compression
damping force. (Turn the adjuster "1"
out.)
Extent of adjustment:
Maximum Minimum
Fully turned in posi-
tion
20 clicks out (from
maximum position)
Standard position:
13 clicks out
* 12 clicks out
* Except for USA and CDN
Standard fitting length:
I.D. MARK/ Q'TY Length
White/1 252 mm (9.92 in)
*253 mm (9.96 in)
*Except for USA and CDN