YL82
Perpetual Restorationist
That makes sense.
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Assessment of My Cylinder Bore/Piston Measurements
- Thread starter YL82
- Start date
The intakes have a larger diameter head so are probably more likely to contact the piston first if something goes wrong. So yes, I'd say it probably is more common to bend them. The exhausts run hotter and take more abuse because of it. They may be made of harder, more expensive steel and maybe that's why they cost more. When I test heads for valve leaks, I'm more likely to find them on the exhausts (almost always) as opposed to the intakes (only sometimes). I lap them all regardless because even ones that aren't leaking do have some pits on the seats. They just haven't accumulated enough of them yet to start leaking - but they will eventually.
YL82
Perpetual Restorationist
5twins: Suggestions as to which 1st OS Rings to go with? OEM, MikesXS, Other?
Thanks.
Thanks.
Mikes used to sell the R.I.K. brand which I think were the same as O.E.M. but the last set I just did was some other brand. They seem nice and are made in Japan. I guess I really don't have a recommendation here. O.E.M. are sweet but usually cost more.
A note on using 1st oversize rings in a stock bore. You're going to have to re-use the original expander ring for the oil rails as the oversize one is too big. You can't cut or grind that one so you have no choice.
A note on using 1st oversize rings in a stock bore. You're going to have to re-use the original expander ring for the oil rails as the oversize one is too big. You can't cut or grind that one so you have no choice.
YL82
Perpetual Restorationist
You're way ahead of me - I had meant to ask that very question, but could not think of the name of that particular ring.
It's the wavy/springy one that resembles a cross-section of cardboard in between the two rails, correct? I haven't quite nailed down proper piston-ring nomeclature or anatomy for that matter.
Disclaimer: Image taken prior to carbon removal from Piston.
It's the wavy/springy one that resembles a cross-section of cardboard in between the two rails, correct? I haven't quite nailed down proper piston-ring nomeclature or anatomy for that matter.
Disclaimer: Image taken prior to carbon removal from Piston.
I am Carbon
shade tree mechanic
It's the wavy/springy one that resembles a cross-section of cardboard in between the two rails, correct?
yes that is correct
YL82
Perpetual Restorationist
Everywhere I've looked thus far have indicated that the KD-872 (replacement carbide cutter for KD-870) has been discontinued. I am awaiting an eBay item that I believe will be the same item. I'll get back to all on this.
http://www.ebay.com/itm/26106048933...X:IT&_trksid=p3984.m1497.l2649#ht_1555wt_1241
Alternative Source: Just talked to Speedway Motors (Nebraska). They have the following currently in stock:
http://www.speedwaymotors.com/Produ...tId=0&searchPhrase=replacement+for+ring+filer
They list dimensions/specs unlike the eBay item I "won".
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donald
XS650 Enthusiast
Why would you use oversize rings in a std piston you are just making extra work for yourself .Oversize rings are intended for a larger bore when you file them to fit properly in a smaller bore they will not be arched correctly and will take longer to seat in properly.We only did this if the proper size was not readily available but the customer was always the one who made the decision
YL82
Perpetual Restorationist
I appreciate and understand your comments, donald. I'll haven't ordered any rings yet, so I'll have to post updates later on as to how things went...
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YL82
Perpetual Restorationist
I've recently honed my cylinders with a Flex Hone and remeasured using a new dial indicator mounted in my cylinder bore gauge.
My piston to bore clearance is approximately 0.0024".
I've been trying to figure out where I got the idea that I needed 1st OS Rings. ?? No idea. I'm glad that I was questioned about that.
Anyway, I think that I can go with Standard Rings with such a clearance. Agree?
My piston to bore clearance is approximately 0.0024".
I've been trying to figure out where I got the idea that I needed 1st OS Rings. ?? No idea. I'm glad that I was questioned about that.
Anyway, I think that I can go with Standard Rings with such a clearance. Agree?
donald
XS650 Enthusiast
Yes you are correct .That clearance indicates very little if any wear.Remember to still check the end gap of your new rings
YL82
Perpetual Restorationist
Will do. Thanks, Donald.
YL82
Perpetual Restorationist
Stupid question deleted from public view!
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scabber
XS650 Guru
YL76 where did you end up buying rings from. Looking to buy some rings. What end gaps did you have first fit.
YL82
Perpetual Restorationist
Ordered 1st OS Rings from Partzilla. Good prices and good to deal with. Same company as Boats.net. I don't recall the gaps right off hand, but followed 5Twins advice on what he sets rings to.
Update: Refer to bottom of Post #14.
Not sure I'm answering your last question. Before grinding, the gaps on the OS rings were zero or negative. Too big. Took a bit of grinding, but no big deal. Just time consuming.
Update: Refer to bottom of Post #14.
Not sure I'm answering your last question. Before grinding, the gaps on the OS rings were zero or negative. Too big. Took a bit of grinding, but no big deal. Just time consuming.
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scabber
XS650 Guru
Thanks for the feedback on the rings. Sounds like the standard ring would have worked.
YL82
Perpetual Restorationist
Refer to Post #7 from 5twins in the below thread:
http://www.xs650.com/forum/showthread.php?t=133
This went into my thinking - I was aiming for the minimum spec. I had PM'd 5twins and/or was in discussion with him in another thread on the use of OS rings (during the same time frame as this Thread).
YL82
Perpetual Restorationist
Had to move past Post 666 with haste!
Johnt3
Still learning...
Yes, yes you did!I prefer to hand file it is to easy to take off to much with a ring grinder or a dermal just put your ring between 2pc of 2x4 in your bench vise then take a few strokes of the file and keep checking your ring end gap sure it might be time consuming but it is better to do it right the first time and it wont blow your budget all to hell
