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ENG
CYLINDER AND PISTON
3rd step:
●
Find the piston-to-cylinder clearance with the
following formula.
●
If out of specification, rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
*****************************************************
Piston-to-cylinder clearance =
Cylinder bore “C” –
Piston skirt diameter “P”
Piston-to-cylinder clearance:
0.040 ~ 0.065 mm
(0.0016 ~ 0.0026 in)
<Limit>: 0.150 mm (0.0059 in)
CHECKING THE PISTON RINGS
1.Measure:
●
Piston ring side clearance
Use a feeler gauge.
Out of specification
→
Replace the piston
and rings as a set.
NOTE:
Clean carbon from the piston ring grooves and
rings before measuring the side clearance.
2.Position:
●
Piston ring
(in cylinder)
NOTE:
Insert a ring into the cylinder and push it
approximately 40 mm (1.6 in) into the cylinder.
Push the ring with the piston crown so that the
ring will be at a right angle to the cylinder bore.
a
40 mm (1.6 in)
Side clearance
Standard
Limit
Top
ring
0.03 ~ 0.08 mm
(0.0012 ~ 0.0031 in)
0.13 mm
(0.0051 in)
2nd
ring
0.03 ~ 0.07 mm
(0.0012 ~ 0.0028 in)
0.13 mm
(0.0051 in)
Содержание YFM400FAR
Страница 1: ...LIT 11616 16 02 5TE F8197 10 YFM400FAR SERVICE MANUAL ...
Страница 36: ...2 11 SPEC Cylinder head tightening sequence Item Standard Limit MAINTENANCE SPECIFICATIONS ...
Страница 48: ...2 23 SPEC 1 Radiator 2 Thermostat È To coolant reservoir COOLANT FLOW DIAGRAMS ...
Страница 49: ...2 24 SPEC OIL FLOW DIAGRAMS 1 Camshaft 2 Crankshaft 3 Drive axle OIL FLOW DIAGRAMS ...
Страница 50: ...2 25 SPEC 1 Oil filter OIL FLOW DIAGRAMS ...
Страница 51: ...2 26 SPEC 1 Oil pump 2 Oil strainer OIL FLOW DIAGRAMS ...
Страница 310: ...9 3 ELEC CHECKING THE SWITCHES ...
Страница 338: ...9 31 ELEC LIGHTING SYSTEM ...
Страница 365: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN PRINTED IN U S A ...
Страница 367: ...LIT 11616 17 32 5UH F8197 10 YFM350FAS SUPPLEMENTARY SERVICE MANUAL ...
Страница 386: ... 12 SPEC Cylinder head tightening sequence Item Standard Limit 5 2 4 1 6 3 MAINTENANCE SPECIFICATIONS ...
Страница 396: ... 22 SPEC OIL FLOW DIAGRAMS 1 Camshaft 2 Crankshaft 3 Oil pump 4 Oil strainer OIL FLOW DIAGRAMS ...
Страница 397: ... 23 SPEC 1 Thermo unit 2 Oil pump 3 Oil filter È To oil cooler É From oil cooler OIL FLOW DIAGRAMS ...
Страница 398: ... 24 SPEC 1 Crankshaft 2 Oil filter OIL FLOW DIAGRAMS ...
Страница 480: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN PRINTED IN U S A ...