So the first thing after removal of the stock swing arm assembly, was to remove everything I have no plans to use from the frame. I used a combination of cut off wheels in a 4 1/2" grinder, plasma cutter and "flap" style grinding wheels to cut off the brackets and smooth the welds.
Looks like this. This picture was taken a couple steps ahead.
The bolt for the swing arm was a larger diameter than the stock Z1.
So I reamed the stock bolt bushings with a 3/4 reamer, not quite large enough so I hand finished the holes with a large rat tail file, that took some time but the bolt fits very well.
The length of the bolt was the limiting factor for being able to spread the frame enough for the new swing arm to fit. I had to grind the bolt bushings all the way down to the weld to gain as much room as possible. It took some time to be sure they were flat for the bolt head and nut to have a good surface to ride against.
Finished swing arm bolt bushing.
After loosening the two rear most engine mount bolts, I cut the lower tube in between the engine mounting tabs.
I then used a porta poweer to spread the frame untill I ran out of swing arm bolt length. I cut a length of tube and put it in between the frame tubes, just below the top line of the engine case. I need to leave room for the turbo!!
With the tube installed I released the porta power. The frame stayed a little over 1/2" wider and the swing arm bolt holes lined up perfectly.
I had to remove 1/8" of aluminum from each side of the swing arm and the steel carrier that the bearings ride on. The swing arm bushing holes were bored extra deep so all I did was press them back the required amount. All that was left was to trial fit the swing arm.
Look a real tire. This is the first KZ style bike I have ever had with a decent sized back tire!!!
Next time, mono shock mounts