Subsection 08 (TOP END)
4
R400m
o
tr90A
1
2
3
1. Cylinder
2. Piston assembly
3. Cylinder base gasket
4. Camshaft timing chain
Inspecting the Cylinder
Check cylinder for cracks, scoring and wear ridges
on the top and bottom of the cylinder. If so, re-
place cylinder.
Cylinder Taper
Measure cylinder bore at recommended posi-
tions.
vmr2016-118-001_a
A. First measurement
B. Second measurement
C. Third measurement
CYLINDER TAPER MEASUREMENTS
ENGINE
MEASUREMENTSPECIFICATION
A
5 mm (.197 in)
B
58 mm (2.28 in)
570 engine
C
37 mm (1.46 in)
A
5 mm (.197 in)
B
53 mm (2.09 in)
1000R engine
C
57 mm (2.24 in)
CYLINDER TAPER SPECIFICATION
NEW (MAXIMUM)
0.038 mm (.0015 in)
SERVICE LIMIT
0.090 mm (.0035 in)
Distance between measurements should not ex-
ceed the service limit. Otherwise, replace cylin-
der and piston rings.
Cylinder Out of Round
Measure cylinder diameter:
– in piston axis
– perpendicular to piston axis.
NOTE:
Use the same measuring points as de-
scribed in
CYLINDER TAPER
.
R400m
o
tr92A
A
B
A. Perpendicular to crankshaft axis
B. Parallel to crankshaft axis
CYLINDER OUT OF ROUND
NEW (MAXIMUM)
0.015 mm (.0006 in)
SERVICE LIMIT
0.020 mm (.0008 in)
Installing the Cylinder
Reverse the removal procedure. Pay attention to
the following details.
NOTICE
Always replace cylinder base gasket
before installing the cylinder.
NOTE:
Make sure piston rings are properly
spaced, refer to
PISTON RINGS
in this sub-
section.
Apply engine oil:
– In the bottom area of the cylinder bore
– On the piston rings
– On the piston ring compressor.
Compress piston rings.
20
vmr2016-419
