 |
|
1 - Bore, stroke, pistons, rods, crankpins, flywheels are
the same for all years.
2 - On engines up to 1939, the forked rod was rotated to be
the front rod, to correct oiling problems. On 1939 and later engines,
the forked rod is the rear.
3 - There is a number stamped on the side, of the aluminum heads,
for compression ratio. A 5 is a low compression head, and
a 6 is a high compression head.
4 - Any Sportster distributer or magneto will fit a 1937 to
1973 45" with no modifications.
5 - You may want to update the carburetor with a Linkert
M-88, or other 1-1/4" Linkert. The Tillotson carb came out
on later trikes, and can be used as a replacement. This update
requires a solo (1936-52 WL, WLA) manifold.
6 - Beware of using 1936 and earlier flywheels in later
engines, as the oil holes and keyways are different.
7 - WLA's made, beginning in 1941 through 1945, had their
serial numbers begin with 42WLA?????. The case production number
indicates the correct year of manufacture. Also, there were seven
different configurations of 42WLA's, during these years.