Tuning The Engine; Checking The Play In The Throttle Cable; Adjusting The Play In The Throttle Cable; Carburetor - Idle - KTM 450 EXC Owner's Manual

TUNING THE ENGINE

Checking the play in the throttle cable

15.1

Adjusting the play in the throttle cable

15.2

Carburetor - idle

15.3
–
Move the handlebar to the straight-ahead position. Move the throttle grip back-
wards and forwards to ascertain the play in the throttle cable.
Play in throttle cable
» If the throttle cable play does not meet specifications:
–
Adjust the play in the throttle cable.
Danger
Danger of poisoning Exhaust gases are poisonous and inhaling them may
result in unconsciousness and/or death.
400192-10
–
When running the engine, always make sure there is sufficient ventila-
tion, and do not start or run the engine in an enclosed space without an
effective exhaust extraction system.
–
Start the engine and let it run idle. Move the handlebar to and fro over the entire
steering range.
The idle speed must not change.
» If the idle speed changes:
–
Adjust the play in the throttle cable.
x
–
Remove the fuel tank.
–
Check throttle cable route. (
–
Move the handlebar to the straight-ahead position.
–
Push back bellows
–
Loosen nut
–
Loosen nut
cable at the throttle grip.
Guideline
Play in throttle cable
–
Tighten nut
500153-10
–
Press and hold the throttle grip in the closed setting. Turn adjusting screw
until there is no play in the throttle cable
–
Tighten nut
–
Push bellows
–
Install the fuel tank.
–
Check the play in the throttle cable. (
The idle setting of the carburetor has a big influence on the starting behavior, stable
idling and the response to throttle opening. That means that an engine with a correctly
set idle speed is easier to start than if the idle is set wrongly.
Info
The carburetor and its components are subject to increased wear caused by
engine vibration. Wear can result in malfunctioning.
The idle speed is adjusted with the adjustment screw
400341-10
The idle mixture is adjusted with the idle mixture adjustment screw
( p. 53)
x
p. 59)
.

. Turn adjusting screw in as far as possible.
 
. Turn adjusting screw so that there is play in the gas throttle
 
.

.

on. Check the throttle grip for smooth operation.

( p. 53)
x
3... 5 mm (0.12... 0.2 in)
( p. 83)
x
x ( p. 83)
3... 5 mm (0.12... 0.2 in)
.

p. 83)
.

.

83
out
