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The Vintage Japanese Motorcycle Owners Group: Discussion Forums

Vintage Japanese Motorcycle Owners Group :: View topic - Installing rings on Honda S65


Installing rings on Honda S65

 
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Rizingson
Gear Head
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Joined: Oct 30, 2009
Posts: 1813
Location: Parker, CO

PostPosted: Tue Feb 06, 2018 3:06 pm    Post subject: Installing rings on Honda S65 Reply with quote

I've got a set of STD 13010-035-000 rings and piston which are OEM. After checking ring end gap on each ring and piston clearance it was time to put the rings on the piston. The factory manual shows the top ring as tapered on both sides and the 2nd ring tapered on one top side. The one piece oil ring has tapers on both bottom ring portion and top ring portion which go up. Maybe my eyes are getting weak, but I can't find any taper on the second ring, nor any markings such as dots on the sides of any of the rings. This is using the strong portion of a magnifying glass and light. What's up, are the end sections totally symmetrical on both compression rings? I think I can see some taper on both rings of the the oil ring. Anybody got a clue as to what would be the top or doesn't it matter?
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05c50
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Joined: Oct 26, 2007
Posts: 3001
Location: Greensburg Pa

PostPosted: Tue Feb 06, 2018 9:23 pm    Post subject: Reply with quote

I've never worked on that particular engine, but I've experienced similar problems (no markings, chamfers or tapers). I've been instructed by people that I trust and respect that if there's no chamfer or taper the ring can be installed either way. Also, the upper (top) ring will usually have a shiny/chrome edge and the second ring will be a gray/iron color.

.....Paul

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Rizingson
Gear Head
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Joined: Oct 30, 2009
Posts: 1813
Location: Parker, CO

PostPosted: Wed Feb 07, 2018 8:10 am    Post subject: Reply with quote

Paul, the top ring is shiny and tapered on both sides, so looks like it could be installed either way. 2nd ring looks cast and has square corners on both sides with no marks that I can see. It also looks like it could be installed either way. It's just that the manual goes into a lot of detail with cross section drawings of the rings and their proper orientation. The parts I got came from a known dealership that closed doors in the early 90's and are authentic Honda OEM. Just thought that was weird.
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05c50
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Joined: Oct 26, 2007
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Location: Greensburg Pa

PostPosted: Wed Feb 07, 2018 8:48 am    Post subject: Reply with quote

I've seen, and I'm sure you have too, parts that have been superceded with new design after the repair manuals have been printed. I've worked on Hondas that have 3 piece oil control rings, but the manual shows the one piece style. Sometime you've just have to take an educated guess. Laughing

....Paul

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�75 GL1000-finally finished
�79 KZ200
68 CB450K1-taking up all my time
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