Cylinder bores (2) in crankcase (1) are machined to
t w o different sizes. Cylinder sleeves are also machined
t o two different sizes to fit different size cylinder bores.
T h e two sizes of cylinder bores and cylinder sleeves are
called "Y" and "Z".
A l l six cylinder bores (2) are not always the same size.
C y l i n d e r bores (2) and cylinder sleeves are called by
n u m b e r s one to six counting from front to rear of
at left side of crankcase (1) opposite each cylinder bore (2) about one
below top of crankcase. The letter "Y" opposite a cylinder bore means
is a Y-size cylinder bore. The letter "Z" opposite a cylinder bore means
is a Z-size cylinder bore.
Readings must be within limits given in table 4-28. If
r e a d i n g s are not within given limits, throw away part
and get a new one.
M e a s u r e inside diameter of all six cylinder bores (2). Note this measurement
a n d the number cylinder it was taken from.
GO TO FRAME 3
Table 4-28. Cylinder Bore Wear Limits
Size and Fit
of New Parts
I t e m / P o i n t of Measurement
Y - s i z e cylinder bore inside diameter
4 . 7 5 1 6 to 4.7520
Z - s i z e cylinder bore inside diameter
4.7511 to 407515