Suzuki LT-4WD 1990 Service Manual page 19

2- 5
P ER I O D I C M A I N T E N A N C E A N D TU N E-U P PR O C E DUR E S
VAlVE ClEARANCE
I nspect I n it i a l
200
E very k m
1 000 (600
Excessive va lve c l ea rance resu l ts in va lve noise
a n d insufficient va lve c l earance resu l ts i n va lve
d a m age a n d red u ced power.
i n d i cated a bove, check a n d adj u st the c l ea ra n ce to
the spec i ficat i o n .
V a l ve c l earance spec i f i cat i o ns
I N .
EX .
T h e proced u re fo r adj ust i ng the va lve c l earance is
as fo l l ows .
N O T E :
Valve c l earance i s to be checked when the
engine i s cold.
B oth the i ntake and exhaust va lves m u st be
checked and adj usted when the p iston is at
Top-Dead-Center
p ress i o n stroke.
o
R emove the seat, rea r ca rrier a n d rea r fender.
( R efer to page 3-4. )
•
Remove the spark p l u g a n d va lve i n spect i o n caps
CD .
•
Remove the T. D . C . p l u g
•
Remove the recoi I sta rter. ( R efer to page 3- 1 3. )
•
R otate the magneto roto r to set the p i ston at
(T. D . C . ) of the compress i o n stroke by tu rn i ng
the sta rte r c u p . R otate t h e roto r u nti l t h e "T"
l i ne ® o n the rotor is a l i gned with the a l i g n i n g
mark @ .
o
I nsert the thickness gauge to the c l ea rance be­
tween the va lve stem end a n d the adj u st i n g
screw on t h e rocker a r m .
09900-20803
•
If clea rance is off the spec i fi cat i o n , bring it i nto
the specified ra nge u s i ng the screw d river.
•
Rei nsta l l the spa rk p l ug, valve i n spection caps,
T. D. C. p l u g and reco i l sta rter.
T. D . C. p l u g
tighten i n g torq u e
CAUT I ON :
Secu rely tighten the lock n ut after com pleting
adjustment.
k m m i l es) and
( 1 00
m i l es )
At the d ista nces
0 .03 - 0.08 m m
(0.00 1 - 0.003 i n )
0.08 - 0. 1 3 m m
(0.003 - 0 .005 i n )
(T. D . C. ) of the com ­
® .
T h i c kness gauge
(
)
20 - 25 N-m
2.0 - 2.5 kg-m
1 4. 5 - 1 8 .0 l b-ft