Cylinder Head Installation - Honda CRF450R Fahrerhandbuch Und Wettbewerbsanleitung

4. Clean any gasket material off cylinder (3).
5. Apply engine oil to the cylinder wall, piston
outer surface and piston rings (4).
Route the cam chain (5) through the cylinder.
Install the cylinder over the piston rings by
hand while compressing the piston rings.
NOTICE
Do not damage the piston rings and cylinder
walls.
(3)
(5)
(4)
(3) cylinder (5) cam chain
(4) piston rings
6. Install a new O-ring (6) to the water hose joint
(7).
Install the water hose joint and bolts (8), and
tighten them to the specified torque:
10 N·m (1.0 kgf·m, 7 lbf·ft)
(8)
(6) (7)
(6) O-ring (new) (8) bolts
(7) water hose joint
Piston/Piston Rings/Piston Pin

Cylinder Head Installation

1. Install the cam chain guide (1) and fit the cam
chain guide tabs (2) in the cylinder cutouts (3).
Push the guide until it bottoms in the crankcase
guide groove.
(3)
(1) cam chain guide (3) cylinder cutouts
(2) cam chain guide tabs
2. Install the dowel pins (4) and a new cylinder
head gasket (5).
NOTICE
Do not let the dowel pins fall into the crankcase.
(4)
(5)
(4) dowel pins
(5) cylinder head gasket
Servicing Your Honda
(1)
(2)
(cont'd)
87