I've got 2 CB175, both 1970. I've been getting stuff for them on e-buy, they're available & cheap (as usual, if you're not in a hurry). Most of the bike swaps out with the CL175, so if you're good with the parts fiche, the market is even more open. It's a SOHC2; basically 1/2 a SOHC4 so almost all means & methods are the same. Unfortunately, neither of mine works right now (I've had 1 for a year and the other for a month...), but I can't wait to get one up & running - it looks like a blast to bomb around town on.