Z2 750 crank (Bossie the Kaw)

tyler let me explain .the Z2 is the same motor as a Z1 except the crank , pistons, and rods .thats how they built a 750 out of a 903.JAP MARKET ONLY some did make it to the US--but very rare.

I also bought these items in 13.











I bought these after the wreck in 86.




More to come.
Steve

kawi810 wrote: tyler let me explain .the Z2 is the same motor as a Z1 except the crank , pistons, and rods .thats how they built a 750 out of a 903.JAP MARKET ONLY some did make it to the US--but very rare.

And I have the crank from one of them.
Steve

thats why you have 750 lol

Oh I forgot some. Four of them.


Steve

Bark bark bark.

Tyler wrote: Just tryin to sort it out.

You have a z1b, and built the engine with a z2 crank rods and block, and put bigger pistons in it. Or am I missing something? Cases trans and head are from a 900 then?

I'll take some pics in the morning of the blocks. The sleeves came out of a 750 and put in a 903 block then bored to 1015. I ruined the bores, then bought a 1015 block. I'll post them then.
Steve

still got a Z2 crank = 750 so why tell everybody you have big bore bike. do you think all the membres of this forum are dumb ? steve stop the bull ***t

You cut the block down? Shaved the block so the sleeves match the block hieght then?

No the sleeves dropped in. I didn't change anything. I had no idea the rods were shorter and I'm not sure they are that much shorter. Time will tell.
This IS a unusual build.
Steve

kawi810 wrote: still got a Z2 crank = 750 so why tell everybody you have big bore bike. do you think all the membres of this forum are dumb ? steve stop the bull ***t

It appears you are saying that the Z2 crank makes the motor 750cc no matter what the bore. I'm sure you know that isn't the case, so what is it you are trying to communicate? The diameter of the cylinders = the bore, so why wouldn't a bike with large diameter cylinders (such as the block from an engine that started life with 1015cc) and a shorter stroke crank still be a big bore bike? I don't get it. Ed

kawi810 wrote: THE fuss here is the BS going on about a big bore motor whith a 750 crank are you not smart enough to figure it out ?

Kawi810,
I'm publicly asking you to dial it back. If you disagree, with swest, you may do so civilly. If you can't manage that, I can help.
KZCSI