Yamaha YZF-R1, Service Manual

Page: 135 / 808

PERIODIC MAINTENANCE
3-28
Spring preload
NOTICE
ECA13590
Never go beyond the maximum or minimum
adjustment positions.
1. Adjust:
• Spring preload
a. Loosen the locknut “1”.
b. Adjust the spring preload with the special
wrench included in the owner’s tool kit.
c. Turn the adjusting ring “2” in direction “a”
or “b”.
TIP
The spring preload setting is determined by
measuring distance “c”. The longer distance “c”
is, the higher the spring preload; the shorter dis-
tance “c” is, the lower the spring preload.
d. Tighten the locknut to the specified torque.
EAS30809
CHECKING THE CONNECTING ARM AND
RELAY ARM
Refer to “CHECKING THE CONNECTING ARM
AND RELAY ARM” on page 4-117.
EAS30656
CHECKING THE ENGINE OIL LEVEL
1. Stand the vehicle on a level surface.
TIP
• Place the vehicle on a maintenance stand.
• Make sure the vehicle is upright.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Check:
• Engine oil level
The engine oil level should be between the
minimum level mark “a” and maximum level
mark “b”.
Below the minimum level mark
→
Add the
recommended engine oil to the proper level.
Direction “a”
Spring preload is increased (suspen-
sion is harder).
Direction “b”
Spring preload is decreased (suspen-
sion is softer).
1
a
b
2
c
Spring preload
Minimum
0 mm (0.00 in)
Standard
4 mm (0.16 in)
Maximum
9 mm (0.35 in)
T
R
.
.
Spring preload adjusting ring
locknut (for YZF-R1M)
25 N·m (2.5 kgf·m, 18 lb·ft)
a
b