Great work, Dick.
Are you going to skim the linings to match the drum? The lining will probably not be parallel with the pivot bore or drum now.
Your lathe should be able to swing the brake plate with linings attached.
G
engine build - slowly but surely
For a final check, I planned to make an arbor to check the shoe lining; I've already had the hubs on the lathe and took a light clean-up cut. I think the shoe spring tension should be enough for a light cut, after I track it with an indicator. Honda put a little clearance on the anchor pin/shoe bore [about.005"], I presume to allow the lining to "float" for a full contact with the drum.
Because two of the shoes were fine, I think that the shoes may have not seated properly in the fixture when they were bored - very easy to happen on mass-produced parts; both shoes had an excess of lining glue on the edge of the casting, which I had to clean off before putting on mill - that's assuming the lining was bonded prior to boring, and affected how they seated on the fixture.
For my track bike replica, I did not want to use fork shrouds. This would leave the springs showing, as well as the unfinished upper tubes. I am not going to use oem headlight bucket, either. I wanted the 33mm tubes finished the entire length, to use clip-ons. After looking at specs on a number of different Hondas, I decided to get forks and triples from a 1979 CX500. The E-bay seller spent some time giving me different dimensions from the CX - close enough to what I wanted. The tubes have very few flaws; of course the sliders and both triples will need re-finished.
The oal of the forks about 3" longer, allowing the top of the tubes to protrude beyond the upper clamp to give me a location for clip-ons; the steering stem races, length, seal same as CB77, and the triple ass'y bolted right up; the CX forks have a 5mm wider spread than the CB, which is only 3/32" per side; the CX travel is 5.2", the CB 3.15"; the CX axle diameters same as CB, only CX uses a M12x1.25 nut, the CB, a M14x1.5 nut. As far as distance between sliders for the CB wheel, it will only be a matter of making spacers to suit. The upper triple has a provision I can use to mount my AutoMeter tach, and other mounting points for a horn. With the forks mounted on the triples, and taking into account the travel, the axle center line is about 1 1/4" greater from the steering head than the stock CB. I can probably account for some of this with a longer rear shock, so as to keep the steering geometry nearly the same. I will also have to make some new steering stops to accomodate the CX lower triple difference.
more pics. Also found a CX500D fender, a little longer than the CX500 Custom. The chrome on the upper clamp nuts very nice.
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