250/300/380 sx,mxc,exc repair manual engine - Tanga Moteurs

Repair manual KTM 250 / 300 / 380 Art No 3206004 -E
14
only 250
13
12
11
10
2
Cylinder exhaust control system
Dismantle and clean all exhaust control components, check for signs of wear and damage.
Control rollers 1 – Check clearance of bearings. Remove oil-derived deposits.
Check toothing of control rollers for signs of wear.
5
3
Gear segments 2 – Check toothing of gear segments and control rollers for signs of wear.
Bearing sleeves 3 – Check bearing sleeves of the control flap for play and easy operation.
Control flap 4 – Clean the control flap. The control flap must not graze inside the exhaust port.
1
Silicon O-rings 5, 8 + 9 – Check silicon O-rings of control flap and control rollers for signs of wear. Renew if necessary.
7 7
6 6
6
7
9
19
8
18
4
9
3
2
5-6C
Cylinder preassembly
– Mount silicon O-rings (16x2 mm) 5 on control rollers and grease.
– Place control rollers 1 in cylinder and mount retaining brackets 6;
secure flat-head screws 7 with Loctite 243.
1
8
5
16
6
17
7