KZ1000 engine in a KZ750L3 frame?

staniel wrote: Thank you, Steell and Kitten Tooth! This is fantastic news indeed! I work in a metal shop, so I can get pretty fancy with the mounts, and now I plan to.

You think the rear through-bolt will be the same, or will that need a pair of hangers as well?

And is the engine going to be powerful enough that I should be concerned about the frame crumpling when I crank it?

baldy110 wrote: Yes it will work and you can still remove the valve cover easily. In fact with the way I have mine set up it is easier to remove the 1100 engine valve cover than it is on my 650, it has more room. I mounted mine as low as possible in the frame. There is no way around having to weld new front motor mount brackets though. You can use the existing rear mount and make spacers to get the motor centered. I noticed on mine you cannot center the motor exactly due to the left side of the engine hitting the frame so with that the engine is about 1/8" set further to the right. This does not pose a problem. The front mounts are the most difficult. You will have to cut off the mounts on the left side along with the right lower mount. You can keep the upper right one but have to fab up a new bracket so the engine will sit lower. The front lower ones you will have to fab and weld new mounts. It is way easier to purchase an empty engine case off of ebay and use it for mock up than to try to muscle the heavy engine in and out until you get it all right, they are pretty cheap. I had mine in and out probably 100 times before I welded all the brackets in for good.
Also the one thing I did not consider was the exhaust. Nothing is going to just bolt on. You will need an exhaust for the KZ1000 engine but the you will have to fab up the exhaust mounts for the rear. Another consideration is the rear sprocket alignment, wiring, ignition system. They are both different. It is not as easy as it looks to get everything to work right with some patience and the right tools you can get it to work quite well.

baldy110 wrote: Yes it will work and you can still remove the valve cover easily. In fact with the way I have mine set up it is easier to remove the 1100 engine valve cover than it is on my 650, it has more room. I mounted mine as low as possible in the frame. There is no way around having to weld new front motor mount brackets though. You can use the existing rear mount and make spacers to get the motor centered. I noticed on mine you cannot center the motor exactly due to the left side of the engine hitting the frame so with that the engine is about 1/8" set further to the right. This does not pose a problem. The front mounts are the most difficult. You will have to cut off the mounts on the left side along with the right lower mount. You can keep the upper right one but have to fab up a new bracket so the engine will sit lower. The front lower ones you will have to fab and weld new mounts. It is way easier to purchase an empty engine case off of ebay and use it for mock up than to try to muscle the heavy engine in and out until you get it all right, they are pretty cheap. I had mine in and out probably 100 times before I welded all the brackets in for good.
Also the one thing I did not consider was the exhaust. Nothing is going to just bolt on. You will need an exhaust for the KZ1000 engine but the you will have to fab up the exhaust mounts for the rear. Another consideration is the rear sprocket alignment, wiring, ignition system. They are both different. It is not as easy as it looks to get everything to work right with some patience and the right tools you can get it to work quite well.