25
BR 500, BR 550, BR 600
– Use a new screw and coat it with
Loctite.
:
Fit the throttle shutter (1) and
tighten it down moderately,
b
3.4
Check that the stamped digits
452RA064
VA
1
(arrow) face up.
– Check that the notch in the
throttle shutter lines up with the
bores (arrows) in the carburetor
body.
:
Loosen the screw (1) slightly.
– Center the throttle shutter so that
452RA065
VA
1
it moves freely.
:
Tighten down the screw (1).
– Check that shutter still moves
freely.
Install all other parts in the reverse
sequence.
Standard setting
Do not remove the limiter caps to
carry out the standard setting.
– With this carburetor it is only
possible to correct the setting of
the high speed screw (
H
) and low
452RA066
VA
speed screw (
L
) within fine limits.
Make the following adjustments:
– Turn the high speed screw (
H
)
counterclockwise as far as stop.
– Turn the low speed screw (
L
)
counterclockwise as far as stop.
– Check the air filter and replace it
if necessary,
b
6.1
If the air filter is dirty, install a new
one – do not clean.
– Check adjustment of throttle
cable,
b
9.3.2
– Check the spark arresting screen
(if fitted),
b
7.6
– Start the engine and allow it to
warm up.
– Adjust engine idle speed.
6.4
Adjusting the Carburetor
6.4.1
User Adjustment
RA_452_00_01_02.book Seite 25 Donnerstag, 16. Februar 2012 11:52 11
