Spark Plug - Beta RR 250 Owner's Manual

3

SPARK PLUG

1
To accede to spark plug, is necessary to
take off saddle and the fuel tank.
To remove the fuel tank proceed as follows.
Unscrew the two screws 1, unscrew the
screw 2 (both side). Close the fuel tap (OFF
position) and disconnect the pipe fuel 3
from the fuel tap.
3
Lift the fuel tank.
2
WARNING:
Do not check while the engine is hot.
Keeping the spark plug in good condi-
tion makes for reduced consumption and
optimum engine performance.
To perform the check, just extract the spark
plug cap and unscrew the spark plug by
means of the provided wrench.
Carefully clean the electrodes using a
wire brush. Blow the spark plug with com-
pressed air to prevent any residues from
getting into the engine.
Measure the spark gap with a thickness
gauge. The gap should be 0,5 - 0,6
mm. If the gap is not as specifi ed, restore
the proper gap by bending the earth
electrode.
0,5 0,6
The spark plug may appear:
black → "fat" carburation
light brown → appropriate carburation
white → "thin" carburation
Check that the insulator is not cracked
and that the electrodes are not corroded,
in which case the spark plug should be
immediately replaced.
Lubricate the spark plug thread, and then
(when the engine is cold) screw in the spark
plug by hand to its abutting end. Finally
tighten the spark plug with the spanner.
Note:
- Always use NGK BR7 ES spark plugs.
GB
46