You can see the taller lip, Photo below . . .
When Sportster tappets wear, the motor sounds noisy
as the roller followers rattle and become loose in their bores.
Cam timing may be affected or varied.
_____________
I've always assumed the aluminum tappet blocks were originally produced for the XLR race motors, and H-D began including these on consumer model engines for cost effectiveness in 1962.
as the roller followers rattle and become loose in their bores.
Cam timing may be affected or varied.
_____________
I've always assumed the aluminum tappet blocks were originally produced for the XLR race motors, and H-D began including these on consumer model engines for cost effectiveness in 1962.
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