Refer to “engine bottom side disassembly” (page 1d- 49).
Refer to “engine bottom side assembly” .
Conrod small end I.D.
Measure the conrod small end inside diameter using the small bore gauge.
If the conrod small end inside diameter exceeds the service limit, replace the conrod.
Special tool
(a): 09900–20602 (dial gauge)
(b): 09900–22401 (small bore gauge
(10 – 18
mm))
Conrod small end i.D.
Service limit: 15.040 Mm (0.5921 In)

Conrod big end side clearance
Special tool
(a): 09900–20803 (thickness gauge)
Conrod big end side clearance service limit: 0.30 Mm (0.012 In)

Special tool
(b): 09900–20205 (micrometer (0 –
25 mm))
(c): 09900–20605 (dial calipers (10
– 34
mm))
Conrod big end width standard: 19.95 – 20.00 Mm (0.7854 – 0.7874 In)
Crank pin width standard: 20.10 – 20.15 Mm (0.7913 – 0.7933 In)

Crankshaft runout
Support the crankshaft using v-blocks as shown, with the two end journals resting on the blocks. Set up the dial gauge as shown, and rotate the crankshaft slowly to read the runout. Replace the crankshaft if the runout exceeds the service limit.
Special tool
(a): 09900–20607 (dial gauge)
(b): 09900–20701 (dial gauge chuck)
(c): 09900–21304 (v blocks)
Crankshaft runout service limit: 0.05 Mm (0.002 In)

Conrod crank pin bearing removal and
installation
Conrod crank pin bearing inspection and
selectionFastener removal and installation
Type a
Removal
Depress the head of fastener center piece (1).
Pull out the fastener (2).
Installation
Let the center piece stick out toward the head so that
the pawls “a” closes.
Insert the fastener into the installation hole.
Note
to prevent the pawl ...
Fuel mesh filter inspection and cleaning
Inspect the fuel mesh filter in the following procedures:
remove the fuel mesh filter. Refer to “fuel pump disassembly and
assembly” .
If the fuel mesh filter is clogged with foreign particles,
it hinders smooth gasoline flow resulting in loss of
engine power. Such a filter ...
Valve seat repair
The valve seats (1) for both the intake and exhaust
valves are machined to three different angles. The seat
contact surface is cut at 45°.
Intake valve
Exhaust valve
Caution
the valve seat contact area must be
inspected after e ...