Honda CRF150R 2020 Owner's Manual & Competition Handbook page 62

Valve Clearance
7. Make sure the piston is at TDC (Top Dead
Center) on the compression stroke. Loosen the
camshaft holder assembly bolts (13) in a
crisscross pattern in two or three steps.
Remove the camshaft holder assembly bolts
and camshaft holder assembly (14).
• As you remove the camshaft holder assembly,
valve lifters and shims may be sticking in the
camshaft holder assembly.
• Keep the intake valve lifters and the shims
separate so you can easily identify the
originally installed location such as intake or
exhaust, right or left.
NOTICE
Do not let the valve lifters and shims fall into the
crankcase.
(13)
(13) camshaft holder assembly bolts
(14) camshaft holder assembly
56
Servicing Your Honda
8. Remove the valve lifters (15).
9. Remove the O-ring (16).
(16)
(15) valve lifters
(14)
10. Remove the shims (17).
Keep the shims separate so you can easily identify
the originally installed location, such as intake or
exhaust, right or left.
NOTICE
Do not let the shims fall into the crankcase.
(15)
(16) O-ring
(17) shims
(17)