166
-
Using a bore measuring instrument, measure
the cylinder bore, in different directions and at
different heights, as shown in the figure.
-
Check that there is no wear or deformation on
the surface of the cylinder that mates with the
cylinder head.
Max. allowable out-of-plane:
Cylinder/cylinder head
0.0020 in
(0.050 mm)
-
Pistons and cylinders are classified according to
the diameter. Pistons should be matched with
cylinders of the same classification (A-A, B-B,
C-C, D-D).
-
Cylinder re-bores must be carried out respecting
the original matching angle on the bored surface
of the cylinder.
-
The surface roughness of the bored surface of
the cylinder should be 0.00004 in (
0.9 m
).
-
This is imperative to ensure proper bedding-in of
the piston rings, and hence reduced oil
consumption and optimum performance.
-
1
st
, 2
nd
and 3
rd
over-size pistons are available as
spare
parts,
for
re-bored
cylinders,
corresponding to 0.2, 0.4 and 0.6 mm over-
sizes, respectively. There are four categories for
matching oversize cylinders (A-A, B-B, C-C,
D- D).
10.10.19 Inspecting the Piston
-
Clean the piston ring grooves thoroughly.
-
Measure the clearance between piston rings and
the grooves using feeler gauges, as shown in
the figure.
-
If the clearances exceed the limits specified in
the table below, the piston should be replaced
by a new one.
Note:
Measure the clearance by inserting the
thickness gauge in the second groove.
Summary of Contents for GT 200
Page 1: ......
Page 90: ...90 9 1 2 Turn Signal Lights Horn Services and Accessory Pre Wiring ...
Page 151: ...151 10 10 Lubrication Circuit ...
