Piston/Piston Rings/Piston Pin - Honda CRF450R 2017 Owner's Manual & Competition Handbook

Piston/Piston Rings/Piston Pin

Piston/Piston Rings/Piston Pin
Refer to Important Safety Precautions on page 23.
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 143).
3. Remove the seat and hang the fuel tank (pages
33, 34).
4. Remove the left and right mufflers (page 112).
5. Remove the exhaust pipe (page 115).
6. Remove the subframe (page 36).
7. Remove the spark plug (page 64).
8. Remove the cylinder head cover (page 65).
9. Set the piston at TDC on the compression
stroke (page 66).
10. Remove the camshaft holder, camshaft and
shims (page 67).
11. Disconnect the ignition coil A connector (1)
and B connector (2).
Remove the ignition coil (3) by removing the
ignition coil bolts (4).
(3)
(1)
(2)
(1) ignition coil A connector (3) ignition coil
(2) ignition coil B connector (4) ignition coil bolts
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Servicing Your Honda
12. Disconnect the ECT sensor connector (5).
(5) ECT sensor connector
13. Loosen the radiator hose clamp screw (6) and
disconnect the radiator hose (7).
14. Remove the right radiator lower mounting bolt
(8) and washer (9).
(9)
(7)
(6)
(6) radiator hose clamp screw
(7) radiator hose
(4)
(8) right radiator lower mounting bolt
(9) washer
15. Loosen the insulator band screw (10) and pull
the throttle body (11) out from the insulator
(12).
Do not hang the throttle body and support it with a
suitable strap.
(10)
(5)
(10) insulator band screw
(8)
(11) throttle body
(12) insulator
(11)
(12)