J engine ring end gap

  • Scirocco
  • Offline
  • Premium Member
  • Never change a running system
More
27 Jul 2018 15:26 - 27 Jul 2018 15:28 #787756 by Scirocco
Replied by Scirocco on topic J engine ring end gap

SWest wrote:
Looks like wrong crosshatch. What do the rings look like?

This requires to pull the head, i would bit the bullet to confirm the scorings on the rings and pistons.
 
My 1975 Z 1 B 900 Project

www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Last edit: 27 Jul 2018 15:28 by Scirocco.

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

  • SWest
  • Offline
  • Sustaining Member
  • 10 22 2014
More
27 Jul 2018 15:40 #787757 by SWest
Replied by SWest on topic J engine ring end gap
Looks like the head is already off. Is it a overbore? If so it was a lousy job and the hone wouldn't clean it up. I suspect particles of metal scored the bores. 
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

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

  • Scirocco
  • Offline
  • Premium Member
  • Never change a running system
More
27 Jul 2018 15:53 - 27 Jul 2018 15:56 #787758 by Scirocco
Replied by Scirocco on topic J engine ring end gap
Could be an endoscope view through the spark plug bore.
VTEC know the answer. 
My 1975 Z 1 B 900 Project

www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Last edit: 27 Jul 2018 15:56 by Scirocco.

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

  • SWest
  • Offline
  • Sustaining Member
  • 10 22 2014
More
27 Jul 2018 15:58 #787759 by SWest
Replied by SWest on topic J engine ring end gap
In any event the horizontal grooves would cause ring "chattering." My next question would be the piston/wall clearance. 
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

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

  • SWest
  • Offline
  • Sustaining Member
  • 10 22 2014
More
27 Jul 2018 16:19 #787762 by SWest
Replied by SWest on topic J engine ring end gap
After looking at it again it looks like the marks stop at the top ring. Must have happened after first install.
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

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

More
27 Jul 2018 18:46 #787772 by VTEC
Replied by VTEC on topic J engine ring end gap
Engine is still together. Pics are with a borescope through the plug hole. Marks go all the way to the top of the bore, above the top ring. Not there on assembly.
KZ1000-K2
ZRX1100
XR400R

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

  • SWest
  • Offline
  • Sustaining Member
  • 10 22 2014
More
27 Jul 2018 18:50 #787773 by SWest
Replied by SWest on topic J engine ring end gap
I'm afraid you're going to have to open it back up.
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

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

More
27 Jul 2018 19:35 #787775 by VTEC
Replied by VTEC on topic J engine ring end gap

SWest wrote: I'm afraid you're going to have to open it back up.
Steve


I know. Really sucks. Just want to be sure of the cause so it doesn't happen again. 
KZ1000-K2
ZRX1100
XR400R

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

  • SWest
  • Offline
  • Sustaining Member
  • 10 22 2014
More
27 Jul 2018 19:47 #787776 by SWest
Replied by SWest on topic J engine ring end gap
Should be obvious.
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

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

More
28 Jul 2018 01:02 #787782 by zed1015
Replied by zed1015 on topic J engine ring end gap
Were the bores washed with clean soapy water after boring and not just solvent ?
If not it's scuffing from the honing grit still trapped in the hatching.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-





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

More
28 Jul 2018 04:32 - 28 Jul 2018 04:34 #787785 by VTEC
Replied by VTEC on topic J engine ring end gap

zed1015 wrote: Were the bores washed with clean soapy water after boring and not just solvent ?
If not it's scuffing from the honing grit still trapped in the hatching.


Yes, I scrubbed the hell out of them. But I did have an issue with flash corrosion within a minute of washing before I could get them dry. Rubbed them down with ATF to take it off, but if you look closely you could still see a hint of rust color. Everybody said don't worry about it.   

You think fuel wash or a heat issue could have caused this?
KZ1000-K2
ZRX1100
XR400R
Last edit: 28 Jul 2018 04:34 by VTEC.

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

More
28 Jul 2018 05:30 #787788 by zed1015
Replied by zed1015 on topic J engine ring end gap
Must have been very cold/ damp to cause that but slight brown staining shouldn't have done anything.
As regards the cause ,who knows ? without pulling it apart but If it runs ok otherwise I would give it a chance and do a few hundred miles and see if it settles.
20 miles isn't enough for a determination unless something drastic happened.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-





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

Powered by Kunena Forum

Forum Links