18" Rear 7 Spoke Mag, w/drum. Does it exist?

I'm wanting to put an 18 inch mag on the rear of my '77 KZ650-B1. It already has mags swapped on from an unknown year, dual disk front, drum rear. I'd rather not have to go through the hassle of making new brackets and all that to put a disk rear, plus the drum looks cleaner to me. I can machine down wheels or build up spacers as necessary, so I'm not worried about that.

I feel like I've seen pictures of these wheels before, but I haven't been having any luck on ebay for the past month or so. I'm hoping to find out exactly which model they are off of so I can shoot some requests out to the salvage yards. Or, buy one off someone here.

1980 KZ650-F1

80-83 KZ550A >>> KZ550-A1/A2/A3/A4

How wide is the 650B rear rim?

martin_csr wrote: 1980 KZ650-F1

80-83 KZ550A >>> KZ550-A1/A2/A3/A4

How wide is the 650B rear rim?

Thank you!

I'm not sure what model my wheels are off of, but my rear is a 16x3. I'm ok with the narrower rear 18, this bike is mostly for looks.

There's no telling what a 16 x 3 came from. 650E Ltd, 650-CSR, 750G Twin & 550-Ltd are a few possibilities.

18" cast alloy wheels for a drum brake are kind of hard to come by. The 440G rear wheel is 18" x 1.85, but it may not be robust enough for a 650. and the 440 hub components are smaller than the 650. I don't know if the brake components or sprocket would line up correctly on the 650. I mention the 440G, because there's one on eb. It's kind of pricy anyway.

The smaller hub components makes sense. The bike I saw ↓ with an 18" drum rear looked like it had a really small drum.



Digging around some, it looks like both the KZ440 and KZ650 use a 17mm rear axle. If I have to machine up a couple spacers to center the wheel and/or chain, that's not an issue.

Thanks for your help, Martin.

Here's another pricy wheel I stumbled across. Item location = France. only 1 photo. 18" x 2.15.
I have no idea how suitable it would be. Enkei Kawasaki rear wheel --- $140.60 T
It could be from a GT550 shaft, in which case it wouldn't work. just posting the link for the heck of it.

I checked eb uk, but didn't find anything. Since standard models were probably more popular over in Europe, was expecting to see one or two from a Z650F, since those were sold outside the USA for several years (80-83 F1 thru F4f). also, Z500/550.