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Yamaha XT250X - Removing the Drive Chain; Checking the Drive Chain

Yamaha XT250X
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CHAIN DRIVE
4-58
EAS23420
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.
NOTE:
Place the vehicle on a suitable stand so that the
rear wheel is elevated.
2. Remove:
Drive sprocket nut “1
Lock washer “2”
NOTE:
Straighten the lock washer tab.
Operate the rear brake, and loosen the drive
sprocket.
After loosening the drive sprocket, remove the
rear wheel and swingarm.
3. Remove:
Swingarm
Refer to “SWINGARM” on page 4-54.
EAS23441
CHECKING THE DRIVE CHAIN
1. Measure:
15-link section “a” of the drive chain
Out of specification Replace the drive
chain.
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a. Measure the length “a between the inner
sides of the pins and the length “b” between
the outer sides of the pins on a 15-link section
of the drive chain as shown in the illustration.
b. Calculate the length “c” of the 15-link section,
push down on the drive chain to increase its
tension.
Drive chain 15-link section length “c” =
(length “a” between pin inner sides + length
“b” between pin outer sides)/2
NOTE:
When measuring a 15-link section of the drive
chain, make sure that the drive chain is taut.
Perform this procedure 23 times, at a different
location each time.
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2. Check:
Drive chain
Stiffness Clean, lubricate, or replace.
3. Clean:
Drive chain
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a. Wipe the drive chain with a clean cloth.
15-link length limit
191.5 mm (7.54 in)
1
2

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