KTM 250 EXC RACING Owner's Manual page 110

4-9E
1
4
– Remove the wire circlip and the push piston bolt from the piston.
Dismount the piston.
Dismounting timing chain and timing gear
– Loosen the 2 bolts
– Remove the timing chain.
1
2
– Remove the bolts
chain guide upward out of the engine casing.
3
– Remove circlip
5
– Apply the puller tool 590.29.033.000 and pull the timing gear off
the crankshaft.
and dismount the fall-out protection element
1
and . Pull timing chain tensioner and timing
3 4
.
5
.
2