KTM 250 EXC-F EU Owner's Manual page 61

SERVICE WORK ON THE CHASSIS
A 0 0 A
B 0 0 0 B
1 2 3 16 17 18
–
Pull on the upper part of the chain with the specified weight
Guideline
Weight of chain wear measurement
–
Measure the distance
Info
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
Maximum distance
chain section
» If the distance
–
Change the chain.
400987-10
–
Check the chain sliding guard for wear.
» If the bottom edge of the chain bolt 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 chain sliding guard.
Guideline
Screw, chain sliding
guard
400983-01
–
Check the chain sliding piece for wear.
» If the bottom edge of the chain bolt is in line with or below the chain sliding
piece:
–
Change the chain sliding piece.
–
Check that the chain sliding piece is firmly seated.
» If the chain sliding piece is loose:
–
Tighten the chain sliding piece.
Guideline
Screw, chain sliding piece
400986-01
10... 15 kg (22... 33 lb.)
of 18 chain links in the lower chain section.

at the longest 272 mm (10.71 in)

is greater than the specified measurement:

x
Info
When the chain is replaced, the rear sprocket and engine sprocket
should also be changed.
New chains wear out faster on old, worn sprockets.
x
M6
x
.

6 Nm Loctite ® 243™
(4.4 lbf ft)
M8 15 Nm
(11.1 lbf ft)
59