Honda CRF150R 2020 Owner's Manual & Competition Handbook page 73

5. Apply clean engine oil to the cylinder wall,
piston outer surface and piston rings.
Route the cam chain (3) through the cylinder
(4).
Install the cylinder over the piston rings by
hand while compressing the piston rings (5).
NOTICE
Do not damage the piston rings and cylinder wall.
(4)
(5)
(3) cam chain (5) piston rings
(4) cylinder
6. Install the cam chain guide (6) and fit the cam
chain guide tabs (7) in the cylinder cut-outs
(8).
Push the guide until it bottoms in the crankcase
guide hole.
(6)
(3)
(8)
(6) cam chain guide
(7) cam chain guide tabs
(8) cylinder cut-outs
Piston/Piston Rings/Piston Pin
(8)
(7)
Cylinder Head Installation
1. Install the dowel pins (1) and a new cylinder
head gasket (2).
NOTICE
Do not let the dowel pins fall into the crankcase.
(2)
(1)
(1) dowel pins
(2) cylinder head gasket
Servicing Your Honda
(cont'd)
67