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  #1  
Old 06-13-2005, 11:45 AM
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Default need help with honing and lubrication during a rebuild

     

hey i have a 2002 cr125r, i am rebuilding the engine, piston, ring, and gaskets of course. This is my first time doing it and i read that you are supposed to at least break the glaze on the cylinder so the ring will seal better. I have the nikasal cylinder if that helps... if i do need to hone it, i only have basic tools, what should i use, sandpaper?? Also i read about needing to lube up the piston rings and cylinder before installation, and before putting the head on to pour a couple ounces premix in there, true?? What all precations and steps do i need to take, i have all my parts just waiting to put them iin correctly. thanks.
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Old 06-13-2005, 11:52 AM
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Default Re: need help with honing and lubrication during a rebuild

I don't know when I get cylinders honed I just bring the cylinder to the bike shop and they do it for like $10, yeah you should lube everything up before putting it all together
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Old 06-13-2005, 11:57 AM
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Default Re: need help with honing and lubrication during a rebuild

Read carefully:

Quote:
Originally Posted by hondageek
Before reassembly, scrub the bore with a scotchbrite pad w/ a little WD40 on it, try to follow the same angle as the original crosshatching. Wash the cyl w/ hot soapy water, dry it, then use a clean paper towel w/ contact cleaner on it until no black residue comes off on the towel. This part will raise a few eyebrows but reassemble the piston, ring,and cyl dry...no oil at all. None. You can put a little on the wrist pin if you like. After assembly hold the kill switch and kick it over 20-30 times to allow the ring to wear into the cyl before it gets much fuel oil mix on it.
Extra reading:

Thread #1

Thread #2


YES, hone it and break the glaze...

NO, do not pour a pint of oil on it before buttoning it up. Good luck.

Last edited by Faded; 06-14-2005 at 05:31 PM.
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Old 06-13-2005, 12:00 PM
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Default Re: need help with honing and lubrication during a rebuild

Well from reading thread #2 it sounds like faded knows a little more about this than me lol, good luck
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Old 06-16-2005, 09:27 AM
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Default Re: need help with honing and lubrication during a rebuild

You do NOT hone cylinders that are Nikasil or Chrome. Use the Scotch brite only. You only hone plain iron/steel cylinders.
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Old 06-16-2005, 10:35 AM
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Default Re: need help with honing and lubrication during a rebuild

Quote:
Originally Posted by Reuel
You do NOT hone cylinders that are Nikasil or Chrome. Use the Scotch brite only. You only hone plain iron/steel cylinders.
Honing with a 280/320 grit aluminum oxide flex (ball) hone is common practice and is an excellent way to break the glaze and prepare the cylinder. On a quality plated bore (not factory Kawasaki) you could spin it until the battery in your drill is dead and not hurt the plating.
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Old 06-16-2005, 12:38 PM
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Default Re: need help with honing and lubrication during a rebuild

I had my CRF450 Honed - it was really short, only about 5 -10 seconds worth.
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Old 06-16-2005, 07:05 PM
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Default Re: need help with honing and lubrication during a rebuild

ok thanks, got r done
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Old 06-20-2005, 09:49 AM
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Default Re: need help with honing and lubrication during a rebuild

Quote:
On a quality plated bore (not factory Kawasaki)
can you elaborate on this?...I'm Curious, as tracy has a KX125 and was just honed for the first time about 3 months ago.
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Old 07-14-2005, 01:10 PM
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Default Re: need help with honing and lubrication during a rebuild

Do not pour premix into the cylinder.

Opinions vary on lubing the piston, ring and cylinder. Some say assemble dry. (me) For your build, lube with light coat of 2 stroke oil if you're more comfortable. Make sure your hands and parts are spotlessly clean.

Regarding honing, I agree with Faded. Anyone that says not to hone a plated cylinder is simply mis-informed based on poor results that happened from the wrong operator using the wrong type hone of the wrong material, wrong grit and with the wrong procedure.

* * I will add this. If you do not have the correct type "ball" "flex hone" of the correct size, (about 10% larger than bore size), material (Aluminum Oxide) and grit (280 is great), then DO NOT HONE. Use the Scotch brite procedure listed previously.


Regarding Factory Kawi Plating, Not sure about last couple of years, but late 90's early 2000's had notoriously bad plating. Most that we send to be re-plated were Green.

Ian
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Old 07-14-2005, 02:02 PM
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Default Re: need help with honing and lubrication during a rebuild

Quote:
Originally Posted by E-man811
Regarding honing, I agree with Faded. Anyone that says not to hone a plated cylinder is simply mis-informed based on poor results that happened from the wrong operator using the wrong type hone on the wrong material, wrong grit and with the wrong procedure.
I would like to add that at any given time, only one of those things needs to be wrong to screw it all up, not all of them...
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Old 07-14-2005, 02:08 PM
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Default Re: need help with honing and lubrication during a rebuild

Good point. Agreed.

I should have put "or" X, "or" X

Ian
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Old 07-14-2005, 02:39 PM
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Default Re: need help with honing and lubrication during a rebuild

Quote:
Originally Posted by E-man811
Good point. Agreed.

I should have put "or" X, "or" X

Ian
Ian, no worries, your fine. Great post, I just wanted to make sure everyone knew that it takes only one "wrong" to ruin the finished product.
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Old 07-15-2005, 01:51 AM
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Default Re: need help with honing and lubrication during a rebuild

Very informative thread.

I had always used 2-stroke oil to lube while rebuilding the top-end.
But after reading this thread I will just lube the bearing.
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Old 07-15-2005, 06:26 AM
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Default Re: need help with honing and lubrication during a rebuild

I guess where i had a problem with this whole thing is the word "hone". In the automotive world (where i come from), honing a cylinder means using a multithousound dollar Sunnen machine to intentionaly remove a few thousands of material from the cylinder. Bored cylinders are intentionaly left slightly undersize so there is material to be "honed" away for the desired finish on the cylinder wall. What we are talking about here is really called "breaking the glaze". "Glaze breaking" is not the same as honing. Maybe everyone already knows this and is not confused by the honing vs glaze-breaking process. But to me when i see the phrase "hone the cylinder", it means take it to a machine shop and let them clean up the cylinder walls by removing 1 or 2 thousands of material. The glaze breaking process essentialy does not remove any material. Has anyone used this type of "Glaze breaker"(pictured in the lower right corner)?
http://www.powersportrider.com/CGI-B...catpage=764.00

Last edited by Reuel; 07-15-2005 at 07:21 PM.
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  #16  
Old 07-15-2005, 03:35 PM
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Default Re: need help with honing and lubrication during a rebuild

Reuel

Oooohh. I get it. Very good point. Same word used in 2 different worlds to describe a different process.

Considering the definition of the word, I guess It could be applicable to both processes.

I've seen it used, but I've not used that one. Nor do I know any of the science bhind the product. Like surface pictures after use, ra results and the like. Maybe I'm just anal, but I'll stick to what I know for know.

Looks like that product would get the job done.

Ian
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