John,
You're correct on the point about the cam tower position. In practice
I have not had to had the towers align bored. Usually the locating
pegs that are used are pretty tight.
Once I have the cam, no rockers, installed I just make sure the
cam turns without binding. If I loose one tower at a time, check,
recheck, and only 'tap' the tower with my rawhide hammer... usually
the cam spins pretty freely.
Usually on the U20 it is a simple matter of just reinstalling the
cam, and having it spin freely!
Cheers,
Tom
>2) If you remove the lower cam towers, the manual warns to have the
>bearings align-bored by a machine shop (is that the right term?) Anyways,
>the idea is that those bearings better be dead-on in alignment. If you're
>feeling lucky, grease it all up, bolt it together without rockers, and see
>if the cam turns freely. If it binds at all at any point, something's not
>aligned well enough.
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