KTM 250 EXC RACING Owner's Manual page 118

5-3E
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2
6
The oil pump housing must not have any score marks or seizing marks.
Blow compressed air through all oil ducts and check them for
unobstructed passage.
Check the 2 dowels
means of Loctite 243.
Right casing half
Remove all shaft seal rings and use an oven to heat the casing half to
approx. 150°C.
4
Cylindrical-roller bearing of crankshaft
Use a suitable punch to press the cylindrical-roller bearing from the
outside to the inside. From the inside, press in a new cylindrical-roller
bearing up to the stop.
Grooved ball bearing of main shaft
Use a suitable punch to press the grooved ball bearing from the outside
to the inside. From the inside, press in a new grooved ball bearing up to
the stop.
NOTE: The grooved ball bearing on the main shaft
screw from the 2003 models. Apply Loctite 243 to the thread of the
screw and tighten to 5 Nm.
Grooved ball bearing of countershaft
Use a suitable punch to press the grooved ball bearing from the outside
5
to the inside. From the inside, press in a new grooved ball bearing up to
the stop.
Shaft seal ring of crankshaft
7
Press in new shaft seal ring to a flush position, its open side facing
inward.
Bearing bolt of the kickstarter idler gear
Bearing bolt of the E-starter idler gear
By experience, no wear occurs on the bearing bolts. Exchanging of
bearing bolts is possible only to a limited extent because, in most cases,
this will cause damage to the casing.
for tight fit and, if necessary, adhere them by
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2
3
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7
is secured with a
3