Motorcycle Carburettor RenovationMotorcycle Frame RenovationChrome PlatingWheel Hubs ButtonPolishingZinc Plating


Casting revonovation process

Sprocket Carriers...

Sprocket carriers, like hubs, look best when finished naturally. Some hubs have chatter marks where the sprocket carrier teeth have rubbed against it. Caused by fitting an H2 hub in lieu of a Z1 hub. They look similar.
The most obvious difference is the step down angle
of the spool. The Z is flat, H2 chamfered.

Early Z sprocket carriers do not have the rib line at middle distance.

Wheel Hubs

Lustrous chrome, bright zinc spokes and a clean hub create a major focal aesthetic.

Often overlooked are the sensory qualities of sharpness and contrast. Restorers often polish spoke spool edges because it looks nice. Polish elongates the spoke holes; repeated polish changes the spool edge from flat to camber.

In theory the hub can be chucked up in a lathe and the flat surface re-introduced. Success rate will vary. Previous polishing may have removed more aluminium from one part of the spool than the other resulting in a flat edge of differing thickness. If you are fortunate to own a hub untouched by human hand leave alone.

Standard bearings have a small part number etched onto the side of the bearing retainer.
If the standard item was numbered 123 do not hesitate fitting bearings numbered 123Z or 123ZZ. Z means sealed one side, ZZ sealed both sides and sealed for life.

Machining a corroded steel brake lining within the hub to remove unevenness shall be limited to the size specified within the hub casting. Exceeding the limit coupled with worn out brake shoes aids the brake camto travel over square. Paraphrased the cam becomes ineffective and the brake arm travel increases disproportionately.