Rotor Interchange - KZ650

I recently got a 77 KZ650. Im wanting to put a drilled rotor on it. Which year rotor / bike models will fit a KZ650B? I saw a 77 KZ650D rotor for sale and wonder if that will fit.

There is no such thing as a 1977 KZ650D. Ed

Should be same. Same as your KZ750 too. Any 76 KZ900 77-80 KZ1000 also are same. except dual disc models have the thinner thickness.There are also some KH500 models that used 4 hole discs.
There is also a service that refurbishes rotor's (someone on the site here has info) you could have drilled your own design.
Check with this site's Brian - "KZ10006" he might have a drilled one. I just bought 2 solid discs from him that I am going to machine

z1kzonly wrote: ..............There is also a service that refurbishes rotor's (someone on the site here has info) you could have drilled your own design.

Here's the place....

www.truedisk.net/

No eBay APP ID and/or Cert ID defined in Kunena configuration

650ed wrote:

z1kzonly wrote: ..............There is also a service that refurbishes rotor's (someone on the site here has info) you could have drilled your own design.

Here's the place....

www.truedisk.net/

Yeah I know Tom. Hes done 4 discs for my other 4 bikes. However, I found an already drilled one and just bought it:

z1kzonly wrote: Should be same. Same as your KZ750 too. Any 76 KZ900 77-80 KZ1000 also are same. except dual disc models have the thinner thickness.

I don't have my manuals handy, but I'm pretty sure there are at least three different diameters for KZ front rotors between '77 and '80. Years ago I converted my '79 KZ650B3 to dual disks. I believe the dual disks were both thinner and smaller diameter. I also seem to recall that the caliper mounts on the fork was moved down to accommodate the smaller disks, so I had to swap forks. But this was 10+ years ago so I may be wrong. Anyone have a manual handy to check?

I do know that the 79/80 KZ1000 (drilled) has smaller diameter front disks than the 77/78 (solid or Z1R drilled).

Another only slightly related detail. The '78 Z1R and the '78 KZ650 SR have front calipers that looks the same as all other KZ calipers, but these use a smaller diameter piston.