Compression Check; Top End-Removal; Cylinder Head Cover; Chain Tension Adjuster - Suzuki GS850G Service Manual

ENGINE
COMPRESSION CHECK
B
The cnnipression of a cylinder is n good in-
dicator of
i t s
internaI condition. The decision
to overhaul the cylinders is often based on the
results of a co~npression
test.
Periodic
maintenance records kepi at vour dealership
D
should include compression readings for each
maintenance service.
Compression
B
Low compression pressure can indicate any of
the following conditioils:
Excessivelv worn cylinder wall
Worn-down piston or piston rings
Pi5ton rings stuck in the grooves
*
Poor scaling of valves
Ruptured or otherwise defective cylinder
head gasket
Overhaul
r
he
engine
in
the following case!
I ) compression pressure in
any one of th
B
cylinder5 i s I c ~ s than 7
kgJcrn2.
2 )
he
di
Frerencc
in con~prcssioti
pressure bet-
ween
the highest and lowest measurements
i~ Inore
than
2 kg/cm2, and 3 )
cornpre~sion
pressure in
t
hc
four
cylinders each is belaiv
9 kg/cm2 (stanrlard) even when i t
measures
more
than 7 kg/crnl.
Con~pression
tcst
procedure:
NO TE:
I ) R ~ f o r ~
t ~ s t i r l g $lie
cornpressio~t
qf
the
P I Z ~ ~ ~ J P ,
tnake sure that the iylir~rler
Irpnd r~rrts and bolls are ~ i g h t e r l ~ d to
sprryicatic~n.
2) Wurtn
rrp
f
/re
erigirr~
heforp re-sting.
1. Remove all spark plugs.
B
2 .
Fit the compression gauge (special tool:
09915-64510)
1 9
in one of the plug holes,
while taking cam that the connection is
tight.
3.
Twist the
throttle grip full open.
B
4. Crank
the
ensinc a
few seconds with the
starter. and record the
maximum
gauge
reading
ns
the compression of that cylinder.
5. Repent this procedure with the othr-
cylinders.
TOP END-REMOVAL
CYLINDER HEAD COVER
/
.-
/
CHAIN TENSION ADJUSTER
This adjustment can he accomplished by first
loosening lock nut
,T>
and tightening screw C?;
and then by removing three mounting bol ts
{%
.
NO TE:
Tiglrrerzing
screw
@ I locks rfie s p r i n ~