Valve Clearance; De-Compression Lever - Suzuki DR350 Service Manual

PERIODIC MAINTENANCE AND TUNE·UP PROCEDURES 2·4
VALVE CLEARANCE
Inspect Initial 5 Hours and Every 6 0 Hours
Excessive valve clearance results in valve noise and insuffi·
cient valve clearance results in valve damage and reduced
power. At the distances indicated above. check and adjust
the clearance to the specification.
The procedure for adjusting the valve clearance is as follows:
NOTE:
Valve clearance is to be checked when the. engine is cold.
Bach intake and exhaust valves must be checked and ad-
justed when the piston is
Bt
Top - Dead- Center (T.D ,C.)
on the compression stroke.
• Remove the frame covers, seat, fuel tank and ignition coil.
• Remove the spark plug and valve inspection caps, intake
and exhaust.
NOTE:
Before adjusting the valve clearance, check or adjust the de-
compression lever clearance,
V alve clea rance sp ecification s
IN .: 0 .0 5 - 0 .10 mm 10 .00 2- 0 .004 in )
EX .: 0 .08 - 0 .13 mm 10 .003 - 0 .005 in )
• Drain engine oiL (Refer to page 2 -7.1
• Remove the T,D.C. inspection plug
CD
and magneto cover
cap
®
on the magneto cover.
• Turn the crankshaft counterclockwise with the box
wrench to set the piston at T.O.C. on th e compression
stroke . (Turn the crankshaft until the engraved line @ on
the magneto rotor is aligned with t he center of hole on
the magneto cover.)
• Insert the thickness gauge into the clearance between
the valve stem end and the adjusting screw on the rock-
er arm .
09900 -2 0803 : Thick ness gauge
09917 -14910 : V alve adju st driver
• If clearance is off the specification. bring it into the speci-
fied range with the special tools .
• Securely tighten the lock nut after adjustment is com -
pleted .
CAUTION:
Both right and left valve clea rances, should be as closely
set as possible.
NOTE:
Make sure to re -check (he de-compression lever play, after
valve clearance adjustment is made.
• Reinstall the removed parts and add engine oil.