Yamaha F200B Service Manual page 415

TIP:
• If the shim thickness adjustment value is
positive, the current shim thickness must
be increased by that amount and, if the
value is negative, the current shim thick-
ness must be decreased by that amount.
• The gray-colored area on the selection
chart indicates the range of the specified
backlash. Shimming is not required if the
measured backlash is within the gray-col-
ored area.
• The values for the shim thickness adjust-
ments specified in the selection chart are
intended to obtain the median value within
the range for the specified forward gear
backlash.
• The table that follows the selection chart
shows the shim thickness adjustments for
the points marked on the chart.
6. Calculate the new forward gear shim (T1)
thickness.
Calculation formula:
New forward gear shim (T1) thickness =
Current forward gear shim thickness +
Shim thickness adjustment
Example:
Use the following formula when the shim
thickness adjustment value is negative.
Current forward gear shim thickness = 0.42
mm
Shim thickness adjustment = –0.12 mm
New forward gear shim (T1) thickness
= 0.42 mm + (–0.12) mm
= 0.30 mm
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
mm
TIP:
• Use the least number of shims to obtain the
required shim thickness.
• If the calculated shim thickness cannot be
obtained with a combination of the avail-
able shims, increase the shim thickness by
0.01 mm.
Shimming (regular rotation model)
7. Install the determined forward gear
shims (T1) and taper roller bearing outer
race. See steps 2 and 3 in "Assembling
the lower case" (8-26).
8
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