Section 04
ENGINE
Subsection 04
(DISASSEMBLY/ASSEMBLY)
04-04-2
MMR2000_119_04_04A.FM
TOP END REMOVAL
Remove the following then lift cylinder head
no. 10
:
– carburetor
– exhaust system
– spark plug
no. 4
– cylinder head cover
no. 2
– cylinder head nuts
no. 11
NOTE:
When removing cylinder head, mark both
push rods
no. 12
for reassembly.
TYPICAL — MECHANIC REMOVING CYLINDER HEAD
1. Cylinder head
2. Mark both push rods for reassembly
Pull out push rods.
CLEANING
Discard all gaskets.
Clean all metal components in a non-ferrous metal
cleaner.
Scrape off carbon formation from cylinder exhaust
port, cylinder head, valves
no. 6
and piston dome
using a wooden spatula.
NOTE:
The triangular mark on the piston dome
must be visible after cleaning.
Clean the piston ring grooves with a groove clean-
er tool, or with a piece of broken ring.
DISASSEMBLY
NOTE:
Before disassembling, mark valve springs
no. 7
, valves
no. 6
and rocker arms
no. 5
. This will
ensure that parts will not be inverse at reassem-
bly.
Unscrew rocker arm pivot lock nuts
no. 9
and rocker
arm pivots
no. 8
. Remove them.
Remove both rocker arms
no. 5
.
TYPICAL — MECHANIC REMOVING ROCKER ARM OF INTAKE
VALVE
1. Rocker arm pivot
2. Rocker arm pivot lock nut
3. Rocker arm
Push down and slide the spring retainer
no. 13
to
the side, so the valve stem slips through the hole,
as shown in the next photo.
TYPICAL — PUSH DOWN AND SLIDE RETAINER TO THE SIDE
A31C25A
1
2
A31C26A
2
1
3
A31C27A
Summary of Contents for Mini Z 2000
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