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In case of 3-cylinder engines, turn the crankshaft 240° and make adjustment for the No.3 cylinder.
Then adjust the No.2 cylinder in this order.
The cylinder to be adjusted first does not have to be the No.1 cylinder. Select and adjust the cylinder
where the piston is the nearest to the top dead center after turning, and make adjustment for other
cylinders in the order of ignition by turning the crankshaft 240° each time.
The adjustment method of reducing the flywheel turning numbers (for reference):
For 3 cylinder engines
Set No.1 cylinder to the compression T.D.C.and adjust the clearance of the mark of the below
table. Next, turn the flywheel once (the suction / exhaust valve of No.1 cylinder is in the position of
the overlap T.D.C. at this time), and adjust the clearance of the mark.
Ignition order of 3 cylinder engines: 1 3 2
Cylinder No.
1
2
3
Valve
Suction
Exhaust
Suction
Exhaust
Suction
Exhaust
No.1
compression
T.D.C
The first time
No.1
overlap
T.D.C
The second time
For 4 cylinder engines
Set No.1 cylinder to the compression T.D.C. and adjust the clearance of the mark of the bottom
table. Next, turn the flywheel once, and adjust the clearance of the mark.
Ignition order of 3 cylinder engines: 1 3 4 2
Cylinder No.
1
2
3
4
Valve
Suction Exhaust Suction Exhaust Suction Exhaust Suction Exhaust
No.1
compression
T.D.C
The first
time
No.4
compression
T.D.C
The
second
time
(b) Valve clearance inspection and adjustment
1) Loosen adjusting bolts
In case of 2-valve cylinder head loosen the lock
nut and adjusting screw, and check the valve for
any inclination of valve cap, entrance of dirt or
wear.
In case of 4-valve cylinder head loosen the lock
nut and adjusting screw of rocker arm. Be careful
that excessive tension isn't applied to the Valve
Bridge, and loosen a locknut of Valve Bridge.
[NOTICE]
When loosening a locknut of a valve bridge, loosen
the locknut while fixing the valve bridge with a
wrench so that the valve may not lean.
