wsm wg972-e4 Workshop Manual page 48

WG972-E4, WSM
Checking Valve Clearance
IMPORTANT
• The valve clearance must be checked and adjusted when
engine is cold.
1. Remove the cylinder head cover and the spark plugs.
2. Align the "1TC" mark (1) on the flywheel and alignment mark (2)
on the rear end plate so that the No. 1 piston comes to the
compression top dead center.
3. Check the following valve clearance marked with "" using a
feeler gauge.
4. If the clearance is not within the factory specifications, adjust
with the adjusting screw.
5. Then turn the flywheel 6.28 rad (360 °), and align the "1TC"
mark (1) on the flywheel and alignment mark (2) on the rear end
plate so that the No. 1 piston comes to the overlap position.
6. Check the following valve clearance marked with "" using a
feeler gauge.
7. If the clearance is not within the factory specifications, adjust
with the adjusting screw.
Adjustable Cylinder Location
of Piston
No. 1
No. 2
No. 3
: When No. 1 piston is at the compression top dead center position.
: When No. 1 piston is at the overlap position.
Intake and exhaust valve
Factory specification
clearance (cold)
NOTE
• The sequence of cylinder numbers is given as No. 1, No. 2
and No. 3 starting from the gear case side.
• After adjusting the valve clearance, secure the adjusting
screw with the lock nut.
(1) "1TC" Mark
(2) Alignment Mark
G-22
GENERAL
Valve Arrangement
Intake valve Exhaust valve
 
 
 
0.145 to 0.185 mm
0.00571 to 0.00728 in.
A: Gear Case Side
9Y1211108GEG0038US0
KiSC issued 07, 2015 A