Kawasaki STX-15F 用户手册
6-34 ENGINE TOP END
Cylinder, Pistons
Cylinder Wear
•
Since there is a difference in cylinder wear in different di-
rections, take a side-to-side and a front-to-back measure-
ment at each of the two locations (total of four measure-
ments) shown in the figure.
If any of the cylinder inside diameter measurements ex-
ceeds the service limit, replace the cylinder.
rections, take a side-to-side and a front-to-back measure-
ment at each of the two locations (total of four measure-
ments) shown in the figure.
If any of the cylinder inside diameter measurements ex-
ceeds the service limit, replace the cylinder.
[A] 10 mm (0.39 in.)
[B] 60 mm (2.36 in.)
[B] 60 mm (2.36 in.)
Cylinder Inside Diameter
Standard:
82.994
∼
83.006 mm (3.2675
∼
3.2679 in.)
Service Limit: 83.10 mm (3.272 in.)
Piston Wear
•
Measure the outside diameter [A] of each piston 18 mm
(0.71 in.) [B] up from the bottom of the piston at a right
angle to the direction of the piston pin.
If the measurement is less than the service limit, replace
the piston.
(0.71 in.) [B] up from the bottom of the piston at a right
angle to the direction of the piston pin.
If the measurement is less than the service limit, replace
the piston.
Piston Diameter
Standard:
82.919
∼
82.934 mm (3.2645
∼
3.2651 in.)
Service Limit: 82.77 mm (3.259 in.)
Piston Ring, Piston Ring Groove Wear
•
Check for uneven groove wear by inspecting the ring seat-
ing.
The rings should fit perfectly parallel to groove surfaces.
If not, replace the piston and all the piston rings.
ing.
The rings should fit perfectly parallel to groove surfaces.
If not, replace the piston and all the piston rings.
•
With the piston rings in their grooves, make several mea-
surements with a thickness gauge [A] to determine piston
ring/groove clearance.
surements with a thickness gauge [A] to determine piston
ring/groove clearance.
Piston Ring/Groove Clearance
Standard:
Top
0.03
∼
0.07 mm (0.0012
∼
0.0028 in.)
Second
0.02
∼
0.06 mm (0.0008
∼
0.0024 in.)
Service Limit:
Top
0.17 mm (0.0067 in.)
Second
0.16 mm (0.0063 in.)
Piston Ring Groove Width
•
Measure the piston ring groove width.
○
Use a vernier caliper at several points around the piston.
Standard:
Top [A]
0.92
∼
0.94 mm (0.0362
∼
0.0370 in.)
Second [B]
1.01
∼
1.03 mm (0.0398
∼
0.0406 in.)
Service Limit:
Top [A]
1.02 mm (0.0402 in.)
Second [B]
1.11 mm (0.0437 in.)
If the width of any of the two grooves is wider than the
service limit at any point, replace the piston.
service limit at any point, replace the piston.