Checking Clutch - KTM 450 SX-F EU Repair Manual

301ENGINE - WORK ON THE INDIVIDUAL PARTS
152
- Place two spacing washers or similar aids next to the timing chain tensioner piston.
This ensures that, when pressed in, the piston cannot go in all the way.
Guideline
1
Th ickness of the spaci ng washers 12 ... 2.5 mm (0.08 ... 0.098 in)
- Release the timing chain tensioner.
Chackinl clutch
, / The detent mechanism engages and the piston remains in place.
Final position of the piston after
engagement
• Info
3
mm
<0.12
in)
I
This position is necessary for installation.
If the timing chain tensioner is now pressed again and is only extended a
maximum of half way
(it
is prevented from extending completely), this locks
the detent mechanism and the timing chain tensioner can no longer be
squeezed together. This function is necessary in order to ensure sufficient
timing chain tension even at low oil pressures.
•
•
~
«8
301246-01
- Check the pressure piece for damage and wear.
• If there is damage or wear:
- Change the pressure piece.
- Check axial bearing for damage and wear.
• If there is damage or wear:
- Change the axial beari ng.
- Place push rod on a level surface and check for run-out.
• If there is run-<lut:
- Change the push rod.
- Check the length of clutch springs
1
Clutch spring - length
• If the clutch spring length is less than the specified value:
- Change all clutch springs.
- Check the thrust face of pressure cap for damage and wear.
• If there is damage or wear:
- Change the pressure cap.
139.0 ... 40.0 mm (1.535 ... 1.575 in)
- Check the thrust surfaces of the clutch lining discs in the outer clutch hub for wear.
1 Contact surface of clutch facing discs in outer clutch hub 1
:s:
0.5 mm
(:S:
0.02 in)