I recently acquired a stash of CB72 parts (i.e. Parts from 1964->65 model with steel fork bottoms). So many parts in fact that I almost have enough to build myself a complete bike, long term. I got a decent front wheel but no rear wheel only the brake plate and brake arms but a local guy is selling me a correct CB72 rear hub. I have a few rear DID rims spare from my other CB250K0/350K1 projects, which are also drum brake & the rims are 18" 36 hole x 1.85, the same size as the CB72/77 Superhawk.
My question is, if I get one of my decent CB350K rear rims rechromed (cost around £100 in the UK to get rechromed) then will this fit the CB72 hub OK in terms of the hole drilling, spoke angles etc. I want the bike to have original, diamond logo DID rims not the modern type Dave Silver sells with the horrid side scripting, which, IMHO look ghastly. He is quoting the same part number for modern rear DID rims for both the CB72/77 and CB350K models. However, checking both Honda parts books the CB72 had a ---268--- part No and the CB250/350K0 had a ---286--- part number. I don't want to have to file out or redrill holes after chrome plating. Another option is to use a perfect NOS but old-style Takasago 1.85 36 hole rim that I have spare.
I believe you would be perfectly fine fitting the 350 rim...if membory serves, the CL72 rear brake is just a tad larger but not enough to cause spoke angle issues.
if you want to sure, test lace it before you have it rechromed.
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I thought the cb77/72 rims were shouldered steel. It wouldn't be correct for the bike.
Shouldered rims are CL72/77 parts(19 inch).
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