Z2 750 crank (Bossie the Kaw)

SWest
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 05:18

No, 58 as opposed to 66.
Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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KZB2 650
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 06:49

#749641

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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SWest
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 07:07

#749644

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.

Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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missionkz
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 16:19

#749679

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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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 17:12

#749680

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

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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missionkz
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 18:16

#749687

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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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 18:20

#749688

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

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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missionkz
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 18:26

#749690

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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missionkz
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 18:54 - 06 Dec 2016 19:04

#749692

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

Last edit: 06 Dec 2016 19:04 by missionkz.

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SWest
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Re: Z2 750 crank (Bossie the Kaw)

06 Dec 2016 19:01

#749694

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

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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cjcrug
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Re: Z2 750 crank (Bossie the Kaw)

10 Dec 2016 02:23

#749876

Nice pass man, looks like it pulls purty good

79 KZ 1000 B3 LTD
Wiseco 1105
Kerker 4 into 1
Dyna s ignition
Andrews cams

81 kz 1000 csr
Wiseco 1075

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cjcrug
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Re: Z2 750 crank (Bossie the Kaw)

10 Dec 2016 02:26

#749877

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
Andrews cams

81 kz 1000 csr
Wiseco 1075

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