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Replace the belt if any of the
following conditions exist:
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1.Hardening of rubber
backing. Back side should be glossy without resilience
and leave no indent when pressed with fingernail.
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2.Cracks on rubber back.
3.Cracks or peeling of canvas. 4.Cracks
at bottom of ribs. 5.Cracks on belt
sides.
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6.Abnormal wear of belt
sides. Normal wear is indicated if the sides are sharp as if
cut
by a knife. Abnormal wear is indicated if the sides are
ragged.
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7.Abnormal wear on teeth.
Initial stage: Canvas worn (fluffy canvas
fibres, rubbery texture gone, white discolouration,
canvas
texture indistinct) Final stage: Canvas worn,
exposing rubber (tooth width
reduced) 8.Missing tooth.
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If the rod moves slightly when
pushing down the rod with 100 -
200 N, bleed the
auto-tensioner of air because air enters.
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1.Set the auto tensioner as
shown in the illustration. 2.Press the rod slowly
down to the lowest point "A" shown in the
illustration. 3.Repeat the procedure 2 three
times. 4.While the rod is projected at the point
"B" shown in the illustration, push the rod
with 100 -
200 N. Check the enough stiffness. If the stiffness is not
enough, replace
the auto tensioner. 5.Press the rod slowly down.
Put the pin through the hole and fix it.
caution |
After the air bleeding
operation has been completed, do not
tilt the auto-tensioner to 60°
or more from the right angle position.
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1.Remove the rocker cover
and ignition coil.
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2.
caution |
Rotate the crankshaft
clockwise at any time.
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Turn the crankshaft clockwise, and align the
crankshaft sprocket timing mark with the
position shown in the illustration.
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3.At that time, check the
right and left camshaft sprocket timing marks are in
position
as shown in the illustration.
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4.Measure the valve
clearances marked with arrows shown in the
illustration. A: When No.1 cylinder is on the top dead
centre of compression stroke. B: When No.4 cylinder is on
the top dead centre of compression stroke.
note |
The valve clearance adjustment
at the exhaust side is not necessary because the
auto lash
adjuster exists.
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5.Using a free gauge, adjust
the clearance between the valve stem end and the adjusting
screw. Standard value: 0.07 -
0.13 mm 6.Hold the adjusting screw not
rotating through a driver and then tighten the rock
nut.
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7.Rotate the crankshaft one
time clockwise and then align the timing mark with the
timing
mark on the crankshaft sprocket. (Place No. 4 cylinder on
the top dead centre of compression
stroke.) 8.Adjust the valve clearance for the rest
of the valves. 9.Install the rocker cover and
ignition coil.
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