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YAMAHA YZ250F(D) Owner's Service Manual Page 193

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A. Air spring characteristics in
relation to oil amount change
B. Load
C. Stroke
1.
Max. oil amount
2.
Standard oil amount
3.
Min. oil amount
SETTING OF SPRING AFTER
REPLACEMENT
As the front fork setting can be easily
affected by rear suspension, take
care so that the machine front and
rear are balanced (in position, etc.)
when setting the front fork.
1. Use of soft spring
• Change the rebound damping.
Turn out one or two clicks.
• Change the compression damp-
ing.
Turn in one or two clicks.
Generally a soft spring gives a soft
riding feeling. Rebound damping
tends to become stronger and the
front fork may sink deeply over a se-
ries of gaps.
2. Use of stiff spring
• Change the rebound damping.
Turn in one or two clicks.
• Change the compression damp-
ing.
Turn out one or two clicks.
Generally a stiff spring gives a stiff
riding feeling. Rebound damping
tends to become weaker, resulting in
lack of a sense of contact with the
road surface or in a vibrating handle-
bar.
FRONT FORK SETTING PARTS
• Front fork spring "1"
SPRIN
SPRING
TY
G
PART NUM-
PE
RATE
BER
0.398
1C3-23141-A1
0.408
1C3-23141-B1
0.418
1C3-23141-C1
SO
FT
0.428
1C3-23141-D1
0.438
1C3-23141-E1 |||||
0.449
1C3-23141-F1
ST
0.459
2S2-23141-
D
M1
0.469
1C3-23141-H1 |-|||
STI
FF
0.479
1C3-23141-J1 |-||||
The I.D. mark (slits) "a" is proved on
the end of the spring.
REAR SUSPENSION SETTING
The rear suspension setting should
be made depending on the rider's
feeling of an actual run and the circuit
conditions.
The rear suspension setting includes
the following two factors:
1. Setting of spring preload
• Change the set length of the
spring.
• Change the spring.
2. Setting of damping force
• Change the rebound damping.
• Change the compression damp-
ing.
7-7
CHOOSING SET LENGTH
1. Place a stand or block under the
engine to put the rear wheel
I.D.
above the floor, and measure the
MA
length "a" between the rear wheel
RK
axle center and the rear fender
(slit
holding bolt.
s)
|
||
|||
||||
|-|
2. Remove the stand or block from
the engine and with a rider astride
the seat, measure the sunken
length "b" between the rear wheel
axle center and the rear fender
holding bolt.
3. Loosen the locknut "1" and make
adjustment by turning the spring
adjuster "2" to achieve the stan-
dard figure from the subtraction of
the length "b" from the length "a".
Standard figure:
90–100 mm (3.5–3.9 in)
• If the machine is new and after it is
broken in, the same set length of
the spring may change because of
the initial fatigue, etc. of the spring.
Therefore, be sure to make reeval-
uation.
• If the standard figure cannot be
achieved by adjusting the spring
adjuster and changing the spring
set length, replace the spring with
an optional one and make readjust-
ment.
CHASSIS

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  • rodrigo Dec 03, 2017 02:34:
    MUY INTERESANT​E EL MANUAL PORQUE AYUDA PARA TENER A PUNTO UN MOTOR BIEN ARMADO TAL COMO INDICA EL MANUAL.