Cylinder System - Honda CR85 2006 Owner's Manual

Refer to Safety Precautions on page 19.
Cylinder Head Removal
Clean the area above the engine before disassembly
to prevent dirt falling into the engine.
1. Drain the radiator coolant (page 39).
2. Turn the fuel valve OFF.
3. Remove the seat and fuel tank (page 29).
4. Remove the radiator hoses (1).
5. Disconnect the spark plug cap (2) and remove
the spark plug (3).
6. Remove the four cylinder head nuts (4) using
the technique described below, and remove
the cylinder head (5).
To avoid warping the cylinder head, use a
crisscross pattern to loosen each nut about
1/4, then remove the nuts.
7. Remove the cylinder head gasket.
(1)
(4)
(1) radiator hoses (4) cylinder head nuts
(2) spark plug cap (5) cylinder head
(3) spark plug
Cylinder Removal
1. Remove the following:
– expansion chamber (page 67).
– cylinder head
– carburetor (page 92).
2. Disconnect the radiator hoses.
3. Loosen the lower clutch cable adjuster (1).
4. Remove the four cylinder mounting nuts (2).
5. Remove the cylinder (3). Do not pry on or
strike the cylinder.
6. Place a clean shop towel in the crankcase to
keep debris out.
7. Remove the reed valve (4) from the cylinder
and replace the gasket.
(4)
(1)
(2)
(1) lower clutch cable adjuster
(2) cylinder mounting nuts
(3)
(3) cylinder
(5)
(3)
(2)
(4) reed valve

Cylinder System

Reed Valve Removal
1. Drain the radiator coolant (page 39).
2. Remove the carburetor (page 92).
3. Remove the radiator hose of the cylinder
head.
4. Loosen the carburetor insulator mounting
bolts (1) in a criss-cross pattern in 2 or 3
steps.
5. Remove the insulator (2) and reed valve (3)
from the cylinder by removing the four
carburetor insulator mounting bolts and clamp
(4).
6. Remove the gasket (5).
(1)
(2)
(4)
(1) carburetor insulator (4) clamp
mounting bolts (5) gasket
(2) insulator
(3) reed valve
Servicing Your Honda
(3)
(5)
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