Tappet Clearance - Suzuki drz 400E Service Manual

TAPPET CLEARANCE

Inspect initially at five hours of operation and every
60 hours thereafter.
INSPECTION
Remove the fuel tank. (
Disconnect the spark plug cap and remove the spark plug.
( 2-9)
Remove the cylinder head cover.
The tappet clearance specification is different for both intake and
exhaust valves.
Tappet clearance adjustment must be checked and adjusted: 1)
at the time of periodic inspection, 2) when the valve mechanism
is serviced, and 3) when the camshafts are removed for servic-
ing.
NOTE:
The piston must be at top dead center (TDC) on the compres-
sion stroke in order to check or adjust the tappet clearance.
The tappet clearance should only be checked when the en-
gine is cold.
Remove the generator cover cap 1 and valve timing inspec-
tion plug 2.
Rotate the crankshaft with a box wrench to set the piston at
TDC on the compression stroke. (Rotate the crankshaft until
the "T" line on the generator rotor is aligned with the center of
the hole in the generator cover.)
Insert a thickness gauge between the tappet and the cam. If
the clearance is out of specification, adjust it to specification
as follows.
09900-20803: Thickness gauge
Tappet clearance (when cold)
IN: 0.10 – 0.20 mm (0.0039 – 0.0079 in)
EX: 0.20 – 0.30 mm (0.0079 – 0.0118 in)
4-2)
PERIODIC MAINTENANCE
1
2
2-5