Repair manual KTM 250 / 300 / 380 Art No 3206004 -E
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.
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.
Silicon O-rings
5, 8 + 9 – Check silicon O-rings of control flap and control rollers for signs of wear. Renew if necessary.
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.
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6 6
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