TOHATSU BFT75A Service Manual page 394

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ROCKER ARM I.D.
Measure and record each rocker arm I.D.
STANDARD:
IN/EX: 20.012 – 20.030 mm (0.7879 – 0.7886 in)
Replace the rocker arm shaft if its O.D. is smaller than
the standard (page 14-30).
ROCKER ARM SHAFT-TO-ROCKER
ARM CLEARANCE
Subtract each rocker arm shaft O.D. from the
corresponding rocker arm I.D.
STANDARD:
0.019 – 0.058 mm (0.0007 – 0.0023 in)
SERVICE LIMIT:
0.080 mm (0.0032 in)
If the rocker arm shaft-to-rocker arm clearance exceeds
the service limit, replace the rocker arm and recheck.
If the rocker arm shaft-to-rocker arm clearance still
exceeds the service limit, replace the rocker arm shaft
(page 14-30).
VTEC ROCKER ARM TEST
(BF90D/BF100A only)
Disconnect the battery negative (–) cable.
Remove the cylinder head covers (page 14-15).
Put the No.1 piston at top dead center of the
compression stroke (page 3-12).
Move the secondary rocker arm [1] of the No.1 cylinder
up and down with your finger. Check that the secondary
rocker arm moves independently from the primary
rocker arm [2].
• If it does not, remove and disassemble the rocker
arm assembly to check (page 14-30).
Put the piston of each cylinder at top dead center of its
compression stroke. Check that the secondary rocker
arm moves independently from the primary rocker arm.
CYLINDER HEAD
[2]
[1]
14-35