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VALVE CLEARANCE
(Fig. 25)
Check valve clearance when the engine is cold at the specified intervals.
Remove the view hole cap on the front-left case cover, magneto cap and
cylinder head cover.
Rotate the flywheel counterclockwise until T mark on the flywheel aligns
with the index mark on the view hole. Check it is in TDC of the compres-
sion stroke by moving the rocker arms. If they are free, it means check can
be done. Otherwise, rotate the flywheel through 360 .
Clearance should be 0.05mm for the intake and exhaust valves.
If it is necessary to make an adjustment, loosen the valve lock nut and
turn the adjusting screw so there is a slight resistance when the feeler gauge
is inserted. Then tighten up the lock nut, and recheck the clearance.
EXHAUAT MUFFLER (EP)
Clear away regularly carbon deposit in the exhaust pipe; check the exhaust
pipe inside for crack and washer for damage, and repair or replace if necessary.
3-WAY CATALYTIC CONVERTER (OPTIONAL) (EP)
3-way catalytic conerter is mounted on the exhaust system of motorcycle. It
is designed to decrease contaminations such as CO, HC, NOx, etc. by redox
reaction to catalyst when the exhaust gases flow through the device.
Applying the catalyst controls the pollutant emissions from the motorcycle,
i.e. a chemical reaction sets in when exhaust gases pass through the converter
14
ＬＦ１２５ＧＹ－５改．ｐ６５
that contains a catalyst. The noble metal catalyst is characterised by good
Fig. 26
adhesiveness, and accelerates a chemical reaction without itself being affected.
A
T mark
Its basic principle is as follow: pollutants in the exhaust gases, such as CO,
Index mark
Adjusting screw
CH, NOx, etc, spread into micro-holes in the catalyst when gases pass through
B
Locknut
the device, an adsorption reaction happens on the surfaces of catalyst, as a
result, converting them into harmless compounds (CO
entering the air. The purging efficiency of catalyst varies with temperature
of, density of and speed of gases.
Attention should be drawn to the following points during service:
1. Handle 3-way catalyst with care, don't knock or press it, and keep away
oil and dirt. It should be stored in dry and well-ventilated place.
2. Never let acid liquid or electrolyte infiltrate into the exhaust muffler,
otherwise, make the catalyst unefficient.
3. Unleaded gasoline should be used.
NOTE The exhaust muffler marked with LC-X is equipped with the product
only. See table below:
(Fig. 27)
Mark
Fig. 27
2012-3-1, 10:30
, H
O, N
, etc.) and
2
2
2
Engine Model
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