Author Topic: recourse?  (Read 962 times)

0 Members and 1 Guest are viewing this topic.

Offline hymodyne

  • Expert
  • ****
  • Posts: 1,302
recourse?
« on: June 10, 2008, 04:55:26 PM »
I'm coming to the conclusion that my 605 overbore kit's one piece oil rings are the source of my high oil consumption  and consequently my constant consternation.

a question: with virtually all of the other components within the upper part of my engine being either new, "like new," or recently reconditioned and/or upgraded, I'm thinking of contacting classic cycle sales in Hilliard, OH; to first complain, and second to request some sort of $$ toward replacing the one piece rings they sold me with a set of 3 piece rings that will address the oil consumption their product produced.

...or I should I just punch my online consumer's "Caveat Emptor" TOUGH SH$T card once again... :-[

hym

"All things are ready if our minds be so."

Offline Gordon

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 12,114
  • 750K1, 550K2
Re: recourse?
« Reply #1 on: June 10, 2008, 05:24:18 PM »
It's worth a shot, but if they resist there's no easy way you can prove it's their rings causing the problem. 

Offline JLeather

  • Expert
  • ****
  • Posts: 775
Re: recourse?
« Reply #2 on: June 11, 2008, 05:07:44 AM »
How much oil consumption are we talking about here?  I know a couple guys running older 836 kits and they had 1-piece oil rings at 10.5:1 compression and the worst they show is a puff when you really get on the throttle.  Cruising around and at lower R's there's no noticeable oil smoke.

Many of the stock Honda rings were one-piece and they were also fine.  So, how much oil are you burning?

I haven't been following your previous threads, so if any of these have been addressed I apologize, but here are some possible issues.  Did you check all your ring end-gaps (oil-ring included) and what were they?  Are you certain the two compression rings are installed correctly?  The middle ring (lower compression ring) acts as a scraper of sorts and if you put it in upside down it will burn amazing amounts of oil.

And lastly, have you contacted the place that sold you the kit to see if anyone else has had this problem?  Perhaps there is a common remedy.  I wouldn't be so quick to blame 1-piece oil rings for severe consumption on a new engine. 

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: recourse?
« Reply #3 on: June 11, 2008, 05:38:21 AM »
Also who bored the engine?

Hard to achieve good sealing, if the bore in not near perfectly round. Was it done on a boring bar, or a hone. What kind of finish honing was done?

Correct me if I am wrong, but seemed to me Honda used 1 pce rings on 750,s and many went 60 K or more without big oiling problems..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline hymodyne

  • Expert
  • ****
  • Posts: 1,302
Re: recourse?
« Reply #4 on: June 11, 2008, 05:47:31 AM »
Thanks for the reply. I'll try to answer some of your questions:

How much oil consumption are we talking about here?  I know a couple guys running older 836 kits and they had 1-piece oil rings at 10.5:1 compression and the worst they show is a puff when you really get on the throttle.  Cruising around and at lower R's there's no noticeable oil smoke.

This engine smokes on acceleration, deceleration and at high speeds. I'm not talking about a puff of smoke, I mean a stream of smoke that is visible in my rear view for an eighth of a mile.

Many of the stock Honda rings were one-piece and they were also fine.  So, how much oil are you burning?

After getting the head back from MRieck with a stage 2 porting and valve job, I started the engine and ran her for 120 miles. After starting with a full crankcase of oil, I ended up having to add 3/4 of a quart to get the oil level back to the full line.

I haven't been following your previous threads, so if any of these have been addressed I apologize, but here are some possible issues.  Did you check all your ring end-gaps (oil-ring included) and what were they?  Are you certain the two compression rings are installed correctly?  The middle ring (lower compression ring) acts as a scraper of sorts and if you put it in upside down it will burn amazing amounts of oil.

When I had the overbore kit put in last year, I put the middle rings in upside down and had oil dripping from my pipes. I took the head off again and checked all the rings as I fixed my error. as far as ring end-gaps are concerned, This was a kit and the supplier did not offer any replacement rings under any circumstances.

And lastly, have you contacted the place that sold you the kit to see if anyone else has had this problem?  Perhaps there is a common remedy.  I wouldn't be so quick to blame 1-piece oil rings for severe consumption on a new engine. 

Classic Cycles of Hilliard, OH doesn't answer their phone and has not responded to my emails concerning replacement parts or the issues discussed in this thread.


Hym
"All things are ready if our minds be so."

Offline hymodyne

  • Expert
  • ****
  • Posts: 1,302
Re: recourse?
« Reply #5 on: June 11, 2008, 05:54:11 AM »
Also who bored the engine?

Hard to achieve good sealing, if the bore in not near perfectly round. Was it done on a boring bar, or a hone. What kind of finish honing was done?

Correct me if I am wrong, but seemed to me Honda used 1 pce rings on 750,s and many went 60 K or more without big oiling problems..

I had the bore/hone done by a machine shop in CT known for their work on Race car engines. The machinist who did the work rejected one of the sleeves supplied in the kit; it had a blemish that he considered unacceptable. this by the way was the only thing that the supplier was willing to replace, since it was identified by a professional mechanic as flawed.

I don't know the particulars as to the method of prepping the sleeves for the pistons. The mechanic had pistons and rings throughout the process.

hym
"All things are ready if our minds be so."

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,596
  • Big ideas....
Re: recourse?
« Reply #6 on: June 11, 2008, 07:23:48 AM »
 Hym....did you reuse the rings after you disassembled to correct the middle ring issue?
Owner of the "Million Dollar CB"

Offline hymodyne

  • Expert
  • ****
  • Posts: 1,302
Re: recourse?
« Reply #7 on: June 11, 2008, 08:09:08 AM »
I did. They were all I had. BryanJ said that the top two rings from a standard 750K might be useable on the pistons I have.
I have one 750 top ring on #4 due to a broken original on install. Should I look into a set of 750 middle rings to replace  my originals?


hym
"All things are ready if our minds be so."