Removing The Rocker Arm; Removing The Valves - KTM 450 EXC-R EU Repair Manual

30/ENGINE - WORK ON INDIVIDUAL PARTS

Removing the rocker arm

Removing the valves

Place 2 spacing washers or similar aids next to the piston of the timing chain ten-
sioner. This should ensure that when pushed down, the piston does not fully with-
draw.
Specification
Thickness of spacers
200172-10
Release the timing chain tensioner.
The latching system locks and the piston stops moving.
End position of piston after latching
Info
This position is necessary for installation.
If the timing chain tensioner is now pressed in once more and then pulled
out maximum halfway (preventing it to come out fully), the latching sys-
tem locks and the timing chain tensioner can no longer be compacted - this
200173-10
function is necessary to ensure sufficient tension of the timing chain, even
at low oil pressure.
Remove screws
200203-10
Screw a fitting screw
Take off rocker arm
200204-10
Take the shims out of the valve spring retainers and set them down according to
their installation position.
Pretension the valve springs using the special tool.
Valve spring mounter (59029019000) (
Valve spring mounting device (78029060000) (
Remove the valve keys and release the tension on the valve springs.
200187-10
2... 2.5 mm (0.08... 0.1 in)
3 mm (0.12 in)
of the rocker arm shafts. Remove plugs
into the rocker arm shafts. Pull out rocker arm shafts
.
P. 178)
85
.
.
P. 183)