Owner's Manual

HT 250
English
25
If there is a noticeable loss of engine
power
N Turn the choke knob to g
N Press in the tab (1) and remove the
filter cover (2).
N Clean away loose dirt from around
the air filter (3) and inside the filter
cover.
N Remove the filter element and
check it – replace if dirty or
damaged.
N Install the filter element in the filter
housing.
N Fit the filter cover.
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the high speed screw within fine
limits.
Standard Setting
N Stopping the engine
N Check chain tension
N Check the air filter and replace it if
necessary.
N Check that the throttle cable is
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
N Have the spark arresting screen
(not fitted in all markets) checked,
and cleaned or replaced if
necessary – see “Inspection and
Maintenance by Dealer"
Replacing the Air Filter
1
2
3
250BA022 KN
Engine Management Adjusting the Carburetor