Cam Chain Tensioner No. 2 Inspection; Cylinder Inspection - Suzuki VLR1800 Service Manual

1D-55 Engine Mechanical:
Valve Spring
The force of the coil spring keeps the valve seat tight.
Weakened spring results in reduced engine power
output and often accounts for the chattering noise
coming from the valve mechanism.
Check the valve springs for proper strength by
measuring its free length and also by the force required
to compress it. If the spring length is less than the
service limit or if the force required to compress the
spring does not fall within the range specified, replace
spring as a set.
Special tool
(A): 09900–20102 (Vernier calipers (1/20 mm,
200 mm))
Valve spring free length (IN. & EX.)
Service limit: 40.7 mm (1.60 in)
Valve spring tension (IN. & EX.)
Standard: 127 – 147 N (13.0 – 15.0 kgf, 28.7 – 33.1 Ib-
ft)/36.6 mm (1.44 in)
Tension "a"
127 – 147 N
(13.0 – 15.0 kgf, 28.7 – 33.1 lbs)
(A)
I649G1140237-03
" a"
" b"
I649G1140238-03
Length "b"
36.6 mm (1.44 in)

Cam Chain Tensioner No. 2 Inspection

Inspect the cam chain tensioner No. 2 in the following
procedures:
1) Remove the cam chain tensioner No. 2. Refer to
"Cylinder Head Disassembly and Assembly
(Page 1D-47)".
2) Check the contacting surface of the cam chain
tensioner No. 2. If it is worn or damage, replace it
with a new one.
3) Install the cam chain tensioner No. 2. Refer to
"Cylinder Head Disassembly and Assembly
(Page 1D-47)".

Cylinder Inspection

Refer to "Engine Top Side Disassembly (Page 1D-25)".
Refer to "Engine Top Side Assembly (Page 1D-30)".
Cylinder Distortion
Check the gasketed surface of the cylinder for distortion
with a straightedge and thickness gauge, taking a
clearance reading at several places as indicated. If the
largest reading at any position of the straightedge
exceeds the limit, replace the cylinder.
Special tool
: 09900–20803 (Thickness gauge)
Cylinder distortion
Service limit: 0.05 mm (0.002 in)
B822H11406051
I822H1140150-01
B822H11406020
I822H1140155-01