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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 05:18 #749631

  • SWest
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No, 58 as opposed to 66.
Steve

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 06:49 #749641

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Wow I thought I read one time it was only a 3mm difference...... 8mm that's like 5/16ths of an inch isn't it?.... Have no idea but man you might a been running 6 or 7 to 1 with that don't you think ??
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 07:07 #749644

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Yeah, with the Wiseco's I didn't notice it. When I lunched another piston and had to use the stock 1000 pistons that came with the 1015 barrels, it was obvious. It still ran great, a little better when I put the 10.25/1's back in. I still haven't done a compression test. I will before I tear it down again. Says a lot about these motors. B)
Steve

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 16:19 #749679

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swest wrote: No, 58 as opposed to 66.
Steve

Wow.... I never realized that you were down 165cc at 6:1 - 7:1 compression ... You're going to have to learn how to ride all over again!!
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 17:12 #749680

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Might be a blessing in disguise. How did you come up with those figures?
Steve

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 18:16 #749687

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swest wrote: Might be a blessing in disguise. How did you come up with those figures?
Steve

wild ass guess and shorter stroke with same bore as a 1015 engine?
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 18:20 #749688

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I'm going to fix my compression tester. It'll give us a better idea what it is. :whistle:
Steve

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 18:26 #749690

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I wish I would have written it down but I think mine was around 175psi a couple weeks after I put the 1075 kit in.
That was about 5000 miles ago.
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Z2 750 crank (Bossie the Kaw) 06 Dec 2016 18:54 #749692

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swest wrote: Might be a blessing in disguise. How did you come up with those figures?
Steve

OK daydreaming.
58mm stroke with 70mm bore?
So 35sqrd x3.1416 x 58
892cc?
But you are running those 70mm 10:1 pistons so ... even with the stroke not pushing the piston further up into the combustion chamber, your actual compression is probably more then 8:1.
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Last edit: by missionkz.

Z2 750 crank (Bossie the Kaw) 06 Dec 2016 19:01 #749694

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I want to weigh both cranks to see if there is a difference or if it's just shorter rods. Looks like something that hasn't been done before. :)
Steve

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Z2 750 crank (Bossie the Kaw) 10 Dec 2016 02:23 #749876

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Nice pass man, looks like it pulls purty good
79 KZ 1000 B3 LTD
Wiseco 1105
Kerker 4 into 1
Dyna s ignition
Dyna green coils
K and n pods
Andrews 2x cams

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Z2 750 crank (Bossie the Kaw) 10 Dec 2016 02:26 #749877

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Lol idk how my post got two pages forward, it was a reply to the video
79 KZ 1000 B3 LTD
Wiseco 1105
Kerker 4 into 1
Dyna s ignition
Dyna green coils
K and n pods
Andrews 2x cams
The following user(s) said Thank You: SWest

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