Ok thanks. I believe you jus cleared it up. The brake stay is at bottom. It looks like I have to 650 arms. With that said , can I just order new bearings? I already have end caps. The z1 bearing kit shows spacers . Do I need those?

Bigmd wrote: Well the more I look at it they seem to be identical. It's possible it was listed wrong on eBay.

The VAST majority of kz parts are listed like alphabet soup on eBay (kz z1 650/900/1000 Z1R dragbike GS is usually in the title or description, which muddies the waters)

I believe the swingarm pivot tube ID and the inner sleeve are the same, the bearings should be able to interchange, pivot tube needs to be shortened to 650 length.

The 1000 arm is wider at the pivot. Shorter than the 650 arm (I think) and uses a 20mm rear axle where the 650 has a 16mm rear axle.

Ok guys currently rebuilding a 79 KZ 650. It's not a complete motor out resto but a fix, replace , restore as I go build. I bought a swingarm off eBay to rebuild and have powder coated . It came with 4 bearings and I later found out it was from a KZ1000. The guy that's working on my bike said it won't fit. So I found another one on eBay from a 1977 650. I just got it today and it seems identical to the 1000. Is there a difference between the 2 of them? I also want to convert to bearings as it currently has bushings. I have the sleeve from the 1000 swingarm. Do I just need to order 4 bearings? Thanks in advance.

Ok, so I spent the day sorting through the rear sets on the bike. I had previously purchased a set from a CBR600, but when I got them home and looked at them on the bike, the foot pegs were arranged way too far back. So I ordered a set of aftermarket rearsets intended for a GSX-R1000, and they were much closer to what I was going for. I was able to use the master brake cylinder from the CBR set on the new rearsets, so that is a plus.

You can see in this picture the difference of where the foot pegs are located:



So my idea for mounting the rearsets was reusing the top stock footpeg mounting post as a standoff for the footpegs, and then making up a post that could be bolted to the frame through the frame reinforcement around the swingarm pivot bolt. Below is what came off of the lathe.



Next I chopped off the threaded section of the top footpeg mounting post:



And I drilled and tapped it for the correct screw.



Finally, I marked and drilled a 1/2" hole for the mounting post, and bolted it all together.



It ended up being nice and strong, I jumped around on it for a little bit, and it is definitely more solid than what the KZ had before. I may work up a small bushing to go over the original mounting post to make it look the same thickness, but that does it for now. The other side involves grinding off the rear brake mount, so I'll probably end up getting to that next weekend.

Rear Swingarm

Next I went on to fit the ZRX1200 swing arm. The swing arm needed some slight grinding on the right hand side of the pivot point to fit in the frame, about 1/8" off. I'm also in the process on making an adapter to replace the swingarm pivot bolt, which I'll post when complete. Like others have found, the swingarm swap requires that you grind off the rear brake pedal mount and install rear sets. I'm currently machining a few parts for the rear set installation, so that'll come later.





I've got a Dyna 17" Street Bob rear wheel coming my way in the mail to replace the green mag, but this should be roughly the same wheel/tire size in the final product.

I think that is it for now. I'll keep you posted as things continue to progress!

Front Wheel

The front wheel is from a 2013 Harley Dyna Street Bob. It has 25mm bearings, which perfectly match the zx9r front axle. I did eliminate the speedo drive for now, and plan to run just one front brake, though the wheel can run dual. I'm still testing the fitting here, but it looks like you have to run brake rotors with zero dish, which is what came with the wheel. I machined some axle spacers to get the wheel centered. I think it looks pretty good.

Hello all!

Long time member, I just wanted to start a thread to share the project bike that I've been working on for the summer. The project is still going, and as I tackle some of the usual issues with these swaps, I wanted to share how I'm approaching them.

The bike is a 1977 KZ1000 A1. I started out riding on a KZ750 Spectre that I unfortunately crashed into the back of a truck that pulled out in front of me. While in the waiting room at the hospital, I paged through a local classifieds ads and found this bike. Immediately after getting discharged, I went over to look at the bike and ended up riding home with it.

The bike had never been in a pristine state, and was raced in the 80's. so there is a lot of non-standard work done on it. I put some clubman bars on it and rode it for a few years, but I always wanted to do some kind of suspension swap. I really think the KZ 1000 has a muscle bike look to it, so I'm going to try to play that up.

The plan:
- Swap in a front end from a 94-97 Zx9r
- Install a ZRX 1200 swingarm
- GSX-R1000 Rearsets
- Harley Dyna street bob spoked wheels
- New Exhaust
- New Seat
- New Wiring Harness
- Engine Rebuild (Winter project)
- Paint

So here it is at the starting point.

Anyone have any leads for a new speedo/tach assembly?
I have a new one however both are failing big time.
I found an OEM one. However it is not in perfect condition.
Thanks for the help.
Myke