Yamaha MT-09 2021 - Checking the Drive Chain; Removing the Drive Chain

4-87
CHAIN DRIVE
EAS30229
REMOVING THE DRIVE CHAIN
1. Stand the vehicle on a level surface.
WARNING
EWA13120
Securely support the vehicle so that there is
no danger of it falling over.
2. Straighten the drive sprocket nut ribs “a”.
3. Loosen:
• Drive sprocket nut
TIP
Loosen the drive sprocket nut while pressing the
brake pedal.
4. Remove:
• Drive chain
NOTICE
ECA17410
Be sure to put on safety goggles when work-
ing.
TIP
Cut the drive chain with the drive chain cut & riv-
et tool.
EAS30230
CHECKING THE DRIVE CHAIN
1. Measure:
• 15-link section length “a” of the drive chain
Out of specification → Replace the drive
chain.
a. Measure the length “b” between the inner
sides of the pins and the length “c” between
the outer sides of the pins on a 15-link sec-
tion of the drive chain as shown in the illus-
tration.
b. Calculate the 15-link section length “a” of
the 15-link section of the drive chain using
the following formula.
Drive chain 15-link section length “a” =
(length “b” between pin inner sides + length
“c” between pin outer sides)/2
TIP
• When measuring a 15-link section of the drive
chain, make sure that the drive chain is taut.
• Perform this procedure 2–3 times, at a different
location each time.
2. Check:
• Drive chain
Stiffness → Clean and lubricate or replace.
Drive chain cut & rivet tool
90890-01550
Drive chain cut & rivet tool
YM-01550
15-link length limit
239.3 mm (9.42 in)
a
G088937
G088938
G088939