Yamaha WR250F(W) Service Manual download pdf (Page 178)

6-20

FRONT FORK

9. Install:

• Slide metal "1"

• Oil seal washer "2"

To outer tube slot.

Press the slide metal into the outer

tube with fork seal driver "3".

10. Install:

• Oil seal "1"

Press the oil seal into the outer tube

with fork seal driver "2".

11. Install:

• Stopper ring "1"

Fit the stopper ring correctly in the

groove in the outer tube.

12. Install:

• Dust seal "1"

Apply the lithium soap base grease

on the inner tube.

13. Check:

• Inner tube smooth movement

Tightness/binding/rough spots

→

Repeat the steps 2 to 12.

14. Compress the front fork fully.

15. Fill:

• Front fork oil

Until outer tube top surface with

recommended fork oil "1".

• Be sure to use recommended

fork oil. If other oils are used,

they may have an excessively ad-

verse effect on the front fork per-

formance.

• Never allow foreign materials to

enter the front fork.

16. After filling, pump the damper rod

"1" slowly up and down more than

10 times to distribute the fork oil.

17. Fill:

• Front fork oil

Until outer tube top surface with

recom-mended fork oil once

more.

18. After filling, pump the outer tube

"1" slowly up and down (about

200 mm (7.9 in) stroke) to distrib-

ute the fork oil once more.

Be careful not to excessive full stroke.

A stroke of 200 mm (7.9 in) or more

will cause air to enter. In this case, re-

peat the steps 15 to 18.

19. Wait ten minutes until the air bub-

bles have been removed from the

front fork, and the oil has dis-

pense evenly in system before

setting recommended oil level.

Fill with the fork oil up to the top end

of the outer tube, or the fork oil will not

spread over to every part of the front

forks, thus making it impossible to ob-

tain the correct level.

Be sure to fill with the fork oil up to the

top of the outer tube and bleed the

front forks.

20. Measure:

• Oil level (left and right) "a"

Out of specification → Adjust.

Fork seal driver:

YM-A0948/90890-01502

Fork seal driver:

YM-A0948/90890-01502

Recommended oil:

Suspension oil "S1"

Standard oil level:

132 mm (5.20 in)

Extent of adjustment:

95–150 mm (3.74–5.91

in)

From top of outer tube

with inner tube and

damper rod "1" fully

compressed without

spring.

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