Section 04 ENGINE
Subsection 04 (DISASSEMBLY/ASSEMBLY)
04-04-8 MMR2000_119_04_04A.FM
From outside crankcase, remove lock pin no. 22
from governor arm shaft, as shown in the next
photo. Remove governor arm shaft no. 14 with
washer no. 23.
REMOVE LOCK PIN
1. Lock pin
2. Governor arm shaft
INSPECTION
Piston, Crankshaft and Camshaft
Inspect camshaft decompressor. If there is any
problems, replace camshaft assembly with new
one.
Refer to COMPRESSION TEST AND ENGINE DI-
MENSION MEASUREMENT 04-05.
Governor System
Check for wear or damage on governor weight
holder.
Check that governor weights move freely inside
governor weight holder.
ASSEMBLY
Seals and Bearings
Using a press, install bearings nos. 12 and 13 so
that they lean on crankcase flange.
Governor System
Reinstall governor weights no. 21 with pins no. 20.
Install governor weight holder washer no. 19 then
install governor weight holder no. 18 on shaft.
Secure governor weight holder with clip no. 17.
CAUTION: Ensure that clip is properly inserted
into shaft groove.
Spread governor weights no. 21 then install gov-
ernor slider washer no. 16 and governor slider
no. 15.
Check that governor slider moves smoothly.
Reinstall governor arm shaft no. 14 with washer
no. 23 inside crankcase. Secure with lock pin
no. 22.
CAUTION: The lock pin must be installed on
the governor arm shaft with the straight side of
the pin against the groove in the shaft.
Piston and Rings
Align piston mark with connecting rod long end
and install piston on connecting rod. See the next
illustration.
1. Piston mark
2. Connecting rod long end
Insert piston pin no. 7 into piston no. 5 and con-
necting rod no. 4.
A31C2KA
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1
A31C2LA
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