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R5 rings

Started by Greaser Greg, November 04, 2020, 08:01:18 PM

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Greaser Greg

When installing ring sets in which one ring has a green coating, does the green one go toward the top, or is it the lower one?
Every day above ground is a good one.
'71 R5B "Rusty"  '71 R5B "Decaf"   '99 KZ 250
'97 XL1200S "The Vibrator"   '08 XL1200N  "Greenie" (totalled)
'78 CB750F "The Skunk"   '74 CB550 "Blackie"    '78 Honda Hobbit

Greaser Greg

 :bacon: :bacon: :whistle:
who likes bacon?
Do you put the green ring on top or bottom?
Every day above ground is a good one.
'71 R5B "Rusty"  '71 R5B "Decaf"   '99 KZ 250
'97 XL1200S "The Vibrator"   '08 XL1200N  "Greenie" (totalled)
'78 CB750F "The Skunk"   '74 CB550 "Blackie"    '78 Honda Hobbit

SoCal250

What brand? Never seen a green ring, although all the ones I've had have been OEM
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

SoCal250

Are you talking about the rings or the expanders (wavy pieces)?  Is this for a keystone type OEM piston? If so, there are 2 ring expanders included. The yellow colored one goes under the top ring. HTH

Part number references can be found here in the Tech Library
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

Greaser Greg

I'm asking about stock yamaha brand that come in the green box, flat style for R5.  I have two or three sets and they all have the coating on the sealing surface of one piston ring; not the expander (those go on the scrap shelf).  There is also a difference in some wiseco nos rings I bought in that one is a dark greyish black and the other is silver. :help: :cheerleader:
Every day above ground is a good one.
'71 R5B "Rusty"  '71 R5B "Decaf"   '99 KZ 250
'97 XL1200S "The Vibrator"   '08 XL1200N  "Greenie" (totalled)
'78 CB750F "The Skunk"   '74 CB550 "Blackie"    '78 Honda Hobbit

dgorms

Greg, I just went through a few sets of my NOS "green box" R5 & DS7 rings. These were still factory sealed. Most have one green and one plain ring, a few had two green rings. There is a slip of paper in the box that states "Application of the expanders", colored yellow to be coupled with top piston ring, non-colored to be coupled with 2nd piston ring. After careful scrutiny I could see the yellow on one of the expanders. While this isn't definitive, I would think the colored ring is the top one........................................... :twocents: .D
rz,r5,ds7,srx,fzr400rr,vfr,cl77,s90, F-7,CL 77, CA-77,ad infinitum

dgorms

Also, after taking a magnifying glass to the rings, the painted one is stamped "N---50", the unpainted one "2N---50". Don't know if that makes any difference........................D
rz,r5,ds7,srx,fzr400rr,vfr,cl77,s90, F-7,CL 77, CA-77,ad infinitum

Greaser Greg

Thanks guys.
Why  didn't they  include more info on the expander slip? must be some kind of clue.  I think I put the green one on top before so will stick to that method unless someone else chimes in. :metal:
Every day above ground is a good one.
'71 R5B "Rusty"  '71 R5B "Decaf"   '99 KZ 250
'97 XL1200S "The Vibrator"   '08 XL1200N  "Greenie" (totalled)
'78 CB750F "The Skunk"   '74 CB550 "Blackie"    '78 Honda Hobbit