Removing The Rocker Arms And Camshaft; Removing The Valves And Valve Springs - Yamaha YFM50S Service Manual

CAMSHAFT, ROCKER ARMS AND VALVES
2
EBS00237
REMOVING THE ROCKER ARMS AND
CAMSHAFT
1. Loosen:
• locknuts
• adjusters
2. Remove:
• intake rocker arm shaft
• exhaust rocker arm shaft
• intake rocker arm
• exhaust rocker arm
NOTE:
_
Remove the rocker arm shafts with the slide
hammer bolt 1 and weight 2.
3. Remove:
• camshaft 1
NOTE:
_
Screw a M8 bolt 2 into the threaded end of
the camshaft and then pull out the camshaft.
1
EBS00238
REMOVING THE VALVES AND VALVE
SPRINGS
1. Check:
• valve sealing
Leakage at the valve seat → Check the
valve face, valve seat and valve seat width.
Refer to "CHECKING THE VALVES AND
VALVE SPRINGS".
M MMM
a. Pour a clean solvent 1 into the intake and
exhaust ports.
b. Check that the valve seals properly.
There should be no leakage at the valve
seat 2.
L LLL
4 - 14
ENG
Slide hammer set
P/N. YU-01083-A
Slide hammer bolt (M8)
P/N. 90890-01085
Weight
P/N. 90890-01084
M MMM M M MMM M M MMM M M MMM
L LLL L L LLL L L LLL L L LLL
M M MMM M MMM
L L LLL L LLL