Ring break in period

  • kzsolo
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Ring break in period

15 Mar 2019 14:18
#800392
'78 KZ750 Twin. Put new rings in it and after firing it up a few times (but no road miles yet) the plugs are a little oily. Cleaning reveals a nice tan insulator under the oil. I am assuming I need to get some miles in before the rings get properly seated. Will this go away quickly or do I need to have some spare plugs with me? Thanks

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  • Scirocco
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Re: Ring break in period

15 Mar 2019 14:55 - 15 Mar 2019 15:00
#800394
Spark plugs, (new rings for the break in), need a specific head for the self cleaning process = riding conditions.
Many cold starts, (fat air/fuel mixture) can fool your spark plugs and Piston rings very quick.
A fat air/fuel mixture can wash away the lubrication oil layer on the cylinder wall, scoring marks.
Last edit: 15 Mar 2019 15:00 by Scirocco.

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  • daveo
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Re: Ring break in period

17 Mar 2019 18:00
#800516
When installing a freshly honed cylinder block, how much oil should there be on the cylinder walls?
1982 KZ1100-A2

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  • DFIGPZ
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Re: Ring break in period

19 Mar 2019 14:03
#800656
I install all of mine ' DRY '
1984 750 Turbo

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  • gordone
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Re: Ring break in period

19 Mar 2019 15:10
#800666
DFIGPZ wrote: I install all of mine ' DRY '

I recived same advise, with my build.
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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  • Nessism
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Re: Ring break in period

19 Mar 2019 16:57
#800672
I use just enough oil to avoid rusting (very light coat).

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  • gordone
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Re: Ring break in period

22 Mar 2019 15:28
#800861
Have I understood it correct, if you use to much the ring will not brake in?

After reborring and honing, I needed to remove cuttings with oil and a rag, so the wall was coated as Nessism advise.
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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