12
FINAL ADJUSTMENT
IMPORTANT
Limiter caps prevent exceeding emission limits and
over rich adjustment, but not over lean adjustment,
which can cause engine failure: Do not exceed rec-
ommended high speed engine rev during operation,
or for long periods during adjustment.
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 min-
utes, operating choke twice to clear air from carburettor
chambers.
3. Run at idle and accelerate to check for smooth transi-
tion from idle to high speed; if engine hesitates, turn L
adjuster anticlockwise 1/8 turn at a time until acceleration
is smooth.
CLEANING AIR FILTER
NOTE
Clean daily.
1. Close choke, remove wing stud, air cleaner cover and air
filter.
2. Brush dust off filter and wash in suitable solvent.
3. Dry filter before reinstalling.
ADJUSTING CARBURETTOR
GENERAL
NOTE
Do not adjust carburettor unless necessary. If you have
trouble with carburettor, see your dealer. Always adjust
carburetor with pipes assembled to the unit.
H
L
T
ADJUSTERS
Idle Speed Adjuster (T)
Control throttle opening at
idle.
Low Speed Mixture Adjuster (L) Controls amount of fuel
at low speed and
supplementary fuel for
smooth progression
from idle to high speed.
High Speed Mixture Adjuster (H) Controls amount of fuel at
full throttle
BEFORE ADJUSTMENT
Check that:
- Air filter is clean and properly installed.
- Spark arrestor screen and exhaust port are free of carbon.
- Blower pipes are installed.
INITIAL ADJUSTMENT
1. With engine off, turn H adjuster anticlockwise to stop.
2. Turn L adjuster midway between stops.
3. Turn T adjuster until tip of adjuster just touches throttle
plate; then turn three turns clockwise.
H
L
T
4. Adjust T adjuster to 2,400 - 3,200 r/min, using tachom-
eter.
NOTE
When there is some trouble with the carburettor, contact
your distributor or dealer.