KTM 250 SX-F 2021 Owner's Manual page 83

–
Pull on the top section of the chain with the specified
A
weight .
Guideline
Weight, chain wear measure-
ment
–
Measure distance
section.
Info
Chain wear is not always even, so you should repeat
this measurement at different chain positions.
Maximum distance
18 chain rollers at the
longest chain section
»
If distance
–
Change the drivetrain kit.
400987-10
–
Check the chain sliding guard for wear.
» If the lower edge of the chain pins is in line with, or below,
the chain sliding guard:
–
Change the chain sliding guard.
–
Check that the chain sliding guard is firmly seated.
» If the chain sliding guard is loose:
–
Tighten the screws on the chain sliding guard.
Guideline
Screw, chain
sliding guard
S01249-01
SERVICE WORK ON THE CHASSIS 11
10 ... 15 kg (22 ... 33 lb.)
B
of 18 chain rollers in the lower chain
272 mm (10.71 in)
B
from
B
is greater than the specified measurement:
Info
When a new chain is mounted, the rear sprocket
and engine sprocket should also be changed.
New chains wear out faster on an old, worn rear
sprocket or engine sprocket.
M6 10 Nm (7.4 lbf ft)
Loctite 243™
®
81