Piston/Piston Rings/Piston Pin - Honda CRF450X 2020 Owner's Manual & Competition Handbook

Piston/Piston Rings/Piston Pin

Piston/Piston Rings/Piston Pin

Refer to Important Safety Precautions on page 31.
Cylinder Head Removal
1. Clean the area above the engine before
disassembly to prevent dirt falling into the
engine.
2. Drain the radiator coolant after cooling the
motorcycle (page 159).
3. Remove the seat and fuel tank (pages 43, 45).
4. Remove the muffler (page 127).
5. Remove the exhaust pipe (page 128).
6. Remove the subframe (page 49).
7. Remove the spark plug (page 80).
8. Remove the cylinder head cover (page 81).
9. Set the piston at TDC on the compression
stroke (page 82).
10. Remove the camshaft holder, camshaft and
shims (page 83).
11. Disconnect the ignition coil A connector (1)
and B connector (2).
Remove the ignition coil (3) by removing the
ignition coil bolts (4).
(1) (3)
(2) (4)
(1) ignition coil A connector (3) ignition coil
(2) ignition coil B connector (4) ignition coil bolts
90
Servicing Your Honda
12. Remove the right radiator lower mounting bolt
(5) and washer (6).
(6)
(5) right radiator lower mounting bolt
(6) washer
13. Loosen the insulator band screw (7) and pull
the throttle body (8) out from the insulator (9).
Disconnect the vacuum tube (10) from the
insulator.
Do not hang the throttle body and support it with a
suitable strap.
(7)
(10)
(9)
(7) insulator band screw
(8) throttle body
(9) insulator
(10) vacuum tube
14. Remove the thermostat case mounting bolts
(11).
Remove the thermostat case assembly (12)
from the cylinder head (13).
(13)
(5)
(11) bolts
(12) thermostat case
(13) cylinder head
(8)
(12)
(11)