Z2 750 crank (Bossie the Kaw)

Put tape measure behind a rod at BDC and TDC. That would put this issue to bed.... er I think... whats this all about anyways?

hows that 4 valve piston working in your motor?

etbike3135 wrote: hows that 4 valve piston working in your motor?

Good eye! I wonder if that piston came in the box because it definitely doesn't belong with the other 3. Ed

This guy has been trying to pick a fight with me since last year. (school yard bully). As I said on another thread that had nothing to do with a 750 crank, when I put in my new 10.25/1 piston I lunched almost two years ago, I will take pics of the deck height, rods and crank markings. He accused mt of lying about even having a Z2 crank. I do, he's a jerk, I will do this in time, not when he tries to badger me into it.
The piston in question is what Z1E sent to me. That held me up for another two weeks. If you'll notice, the numbers on the boxes all match. Someone switched a piston. Why is anyone's guess.
The thing I don't understand is, why the deck height was even with the 10.25/1 pistons and now with the stock pistons they were 2 mm lower? Clearly if the rod or rod/crank is 8 mm shorter, I would have noticed it and wouldn't have runable compression.
If things go as they should, I will be able to do a final tear down and put thing to bed in mid summer when it's too hot to ride anyway.
BTW, I have my eye on a 903 crank and some have been offered here. At that point it will be my option to put in a 903 crank or keep the 750 one. That remains to be seen.
As I said before, I can sell the Z2 crank on eBay for a lot more because it is so rare.
I've been collecting items for when the time comes.




I started this thread to photo document this build. More to come.
Steve

swest wrote: I didn't get the springs and was talked out of the copper head gasket. Then I found I had to buy pistons. Another $500.
Steve

:silly: Velly intoelesting...

the KEY word here is 750 CRANK .if anybody knows motors,

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how would a 750 crank make a 903 motor .you think everybody is stupid ?all they have to do is google kawasaki Z2 750 and they will find the specs for a jap only market 750 based on the z1 w ith short stroke and small bore.but i know yours MAGICAL IT MAKES ANY KZ INTO WHAT EVER YOU SAY IT IS .SO YOU ARE THE REAL POSER.

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LOL

kawi810 wrote: the KEY word here is 750 CRANK .if anybody knows motors,

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how would a 750 crank make a 903 motor .you think everybody is stupid ?all they have to do is google kawasaki Z2 750 and they will find the specs for a jap only market 750 based on the z1 w ith short stroke and small bore.but i know yours MAGICAL IT MAKES ANY KZ INTO WHAT EVER YOU SAY IT IS .SO YOU ARE THE REAL POSER.

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LOL

Ok so swest built an under square motor...

What is the big deal?

Seriously not yrying to fuel the fire, just curuois what the fuss us about.

Stop being jealous and buy a bigger bike. You are ignoring the fact that some Z2's did make it to the US as stated by another member. When the time comes, I will post pics. You a malcontent will just find something else to bark about. Enjoy.
Steve

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 ?

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?

read my post on cc.s with a 58 mm crank

www.thumpertalk.com/topic/801000-1975-ka...0-restoration/page-4

Ok alright got it now... alrighty then carry on...