Z2 750 crank (Bossie the Kaw)

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 11:33
#922276
Wookie58 wrote:
SWest wrote:
asphalt900 wrote:
Steve i know this thread of Z2 Crank info has turned into anything but, ha. I Friend sent me a second Z2 "early" engine to restore. Meaning it will have the "Keyed" rotor crankshaft assy or part number 13031-044. Later ones weren't keyed, tapered friction fit and had a different part number 13031-1007. I know this thread is all of 11yrs old and still running but still interested in those fonts found on connecting rods? 



 

The keyed rotors continued to the early 1000's. I have one. 
I still have the crank so I can take pics of what you need. 
Steve
As I understand it the key disappeared on the 1000 with the switch to the "big pin" crank and the later generator for the MKII around 1980 ?
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 11:42
#922278
Wookie58 wrote:
SWest wrote:
asphalt900 wrote:
Steve i know this thread of Z2 Crank info has turned into anything but, ha. I Friend sent me a second Z2 "early" engine to restore. Meaning it will have the "Keyed" rotor crankshaft assy or part number 13031-044. Later ones weren't keyed, tapered friction fit and had a different part number 13031-1007. I know this thread is all of 11yrs old and still running but still interested in those fonts found on connecting rods? 



 

The keyed rotors continued to the early 1000's. I have one. 
I still have the crank so I can take pics of what you need. 
Steve
As I understand it the key disappeared on the 1000 with the switch to the "big pin" crank and the later generator for the MKII around 1980 ?
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 11:48
#922279
Not sure if it was the first 1000's but I do know the went with a heavier crank for vibration. The lamb chops came back on the later engines, 
I don't know why I couldn't reply to last comment on the quote. 
rumble.com/v2m9q4w-z2z-crank.html



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
The following user(s) said Thank You: Wookie58

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 11:52
#922280
BTW the fonts on the rods are 5ZZ on all four. They moved the pins to make it 58 not 66mm stroke. 
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

Please Log in or Create an account to join the conversation.

  • asphalt900
  • asphalt900's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • Posts: 1667
  • Thanks: 1134

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 14:57 - 16 Mar 2026 14:59
#922281
I was just going to add some literature to your files when i pulled this Z2 engine apart. Haven't even pulled it from the shipping crate yet, waiting on S pring consistent weather. I don't need a crankshaft assy. Actually ran across a fella that had 1 complete engine and going to pick-up 2 more. Back to your tire changing Steve! Ya know there are service stations that do that..right, ha. 
Last edit: 16 Mar 2026 14:59 by asphalt900.

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 15:16
#922282
I've been changing tires since I've been riding and will as long as I can. 
[img

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
The following user(s) said Thank You: asphalt900

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

16 Mar 2026 20:35
#922285
Hardest part of the job. 
[img

Steve

rumble.com/v776fng-mounted-tire.html

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

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

17 Mar 2026 20:18
#922306
A little out of order. 
[img

Steve

rumble.com/v777p7u-tire-balance.html


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

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

19 Mar 2026 20:15 - 19 Mar 2026 20:17
#922367
Not many markings. 
[img

Steve

rumble.com/v77b5ai-z2-crankshaft.html

 
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
Last edit: 19 Mar 2026 20:17 by SWest.

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

26 Mar 2026 19:06
#922567
Finally got my oil. 
[img

Steve

rumble.com/v77g6tq-oil-change.html

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

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar Topic Author
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • 10 22 2014
  • Posts: 23701
  • Thanks: 3001

Re: Z2 750 crank (Bossie the Kaw)

01 Apr 2026 19:18
#922699
It was something stupid again. 
[img

Steve

rumble.com/v77xcpc-brake-light-switch.html

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

Please Log in or Create an account to join the conversation.

  • asphalt900
  • asphalt900's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • Posts: 1667
  • Thanks: 1134

Re: Z2 750 crank (Bossie the Kaw)

03 Apr 2026 06:15
#922729
Good Morning Steve!! Let's get back on track of where this party started, Z2 stuff. Going thru this Z2, finally. Going thru the whole thing after someone else had their hand at it. Power coated the engine but too shiny of finish.      

Please Log in or Create an account to join the conversation.

Moderators: Street Fighter LTD
Powered by Kunena Forum