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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #1  
Old 14th July 2010
Highway13 Highway13 is offline
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Default piston rings - stupid question

Howdy all -

I'm putting the top end of my '81 back together. My rings don't have a dot or "T" to mark the top, so I'm trying to figure out how they go in. The FSM says to put the "chamfered side up" - does that mean like this?
____
____\

and not like this?
_____
____/
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  #2  
Old 14th July 2010
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misterT misterT is offline
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Yes you are correct the chamfered side would be up as in the first illustration l_\
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  #3  
Old 14th July 2010
Highway13 Highway13 is offline
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Thanks!

I felt stupid even asking, but after all the money getting it bored out and whatnot I'd hate to put 'em in upside down......

Cheers,
Blair
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  #4  
Old 14th July 2010
steve0suprem0 steve0suprem0 is offline
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I was always told the only stupid question is the one that isn't asked. You certainly aren't gonna be judged or ridiculed from this direction. Everybody was a noob once, and some still are.
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Old 14th July 2010
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ezmerf ezmerf is offline
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You do know to ck end gap on the rings right.
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  #6  
Old 14th July 2010
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frenchandy frenchandy is offline
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tried to fit some new rings to my triumph recently.
Lucky I checked the gap as they where 2 mm!.

phoned the dealer who sent me them and he said "dont use them there s**t".
After some debate he sent me a set of decent ones free.
Rings should be marked compression ,scraper and oil by the way.
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Old 14th July 2010
Highway13 Highway13 is offline
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Yep, I checked the gap. I've just never seen rings that weren't marked, and since there's an obvious bevel on the top 2 rings, I knew one side had to be "up."

Thanks again,
Blair
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  #8  
Old 14th July 2010
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hdsince73 hdsince73 is offline
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yep chamfered side up,I put them in upside down once mine werent marked either,it ran fine but smoked like a bitch because it dragged the oil up into the combustion chamber instead of down like it was suppossed to.
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