See also in the Sportsterpedia:
The factory machine work on 70< cam covers is stellar. 1)
Reproducing it at home is nearly impossible. Even in a full machine shop its very time consuming.
A good (at home) job is possible if you know what your doing.
Bushings that haven't already spun out will need to be pulled out.
See also Cam Bushing Measuring / Removal / Installation Tools in the Sportsterpedia for some ideas on tools you can use to remove the bushings.
Check local auto parts stores for a pilot bearing puller. 2) |
Click on a pic to enlarge.
The factory uses pins because they cost less to make and install. Their install procedure is tuned to the tight tolerances pinning requires. 12)
You can buy a drilling guide / jig to put the pin hole in the right place. They're a cheap investment.
If you have access to a machine shop, it would be a simple guide to make.
Bushing Pining Jig 14) |
Reaming a hole is no more than a hole sizing operation. If the drilled hole is not on location and square the reamed hole will not be either. 18)
Boring the hole with a milling machine is the best option if possible.
For those guys who want the best job they can get, don't ream at all. Make your own bushes and in-position bore them in a mill just like the factory does. 19)
A reamer cuts along its chamfer angle, not on its outside diameter. 21) | Bridge and Hand Reamers have a starting taper that is too long for blind hole work. Each has a different starting taper angle. 22) |