Removing The Drive Chain; Checking The Drive Chain - Yamaha YZF-R1 Series Service Manual

EAS30229

REMOVING THE DRIVE CHAIN

1. Stand the vehicle on a level surface.
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
TIP
Place the vehicle on a maintenance stand so
that the rear wheel is elevated.
2. Straighten the drive sprocket nut rib "a".
a
3. Remove:
• Drive chain
ECA17410
NOTICE
Be sure to put on safety goggles when work-
ing.
TIP
Cut the drive chain with the drive chain cut & riv-
et tool.
Drive chain cut & rivet tool
90890-01550
Drive chain cut & rivet tool
YM-01550
EAS30230

CHECKING THE DRIVE CHAIN

1. Measure:
• 15-link section length "a" of the drive chain
Out of specification → Replace the drive
chain.
15-link length limit
239.3 mm (9.42 in)
a. Measure the length "a" between the inner
sides of the pins and the length "b" be-
tween the outer sides of the pins on a 15-
link section of the drive chain as shown in
the illustration.
G088937
b. Calculate the 15-link section length "c" of
the drive chain using the following formula.
Drive chain 15-link section length "c" =
(length "a" between pin inner sides +
length "b" between pin outer sides)/2
TIP
• When measuring a 15-link section of the drive
chain, make sure that the drive chain is taut.
a
• Perform this procedure 2–3 times, at a different
location each time.
G088938
2. Check:
• Drive chain
Stiffness → Clean and lubricate or replace.
G088939
3. Clean:
• Drive chain
a. Wipe the drive chain with a clean cloth.
b. Put the drive chain in kerosene and re-
move any remaining dirt.
c. Remove the drive chain from the kerosene
and completely dry it.
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CHAIN DRIVE