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14th July 2010
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Biker
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Join Date: Aug 2008
Posts: 6 Sportster/Buell Model: XLH Sportster/Buell Year: 1981 Other Motorcycle Model: Triumph Other Motorcycle Year: 1969
Reputation: 10
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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?
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and not like this?
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14th July 2010
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Master Custom Bike Builder
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Join Date: Feb 2007
Location: northern IN.
Posts: 3,336 Sportster/Buell Model: 1200R 90+HP Sportster/Buell Year: 2004 Sportster/Buell Model #2: 2276cc VW sandrail Sportster/Buell Year #2: 1976
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Yes you are correct the chamfered side would be up as in the first illustration l_\
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04 1200R 90+HP/10.5-1 SE pistons/.536 cams/Heads by MR T/mikuni HSR 42 w/25 pilot, 96 needle, 170 main/TC88A ignition w turbotas mod 33 map pos.4/ Supertrapp 2-1 w 23 disks/ 28T FRONT PULLEY /NRHS Hurricane A/C & adj. pushrods /progressive 440 shocks & fork springs w/10 OZ SE fork oil
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14th July 2010
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Biker
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Join Date: Aug 2008
Posts: 6 Sportster/Buell Model: XLH Sportster/Buell Year: 1981 Other Motorcycle Model: Triumph Other Motorcycle Year: 1969
Reputation: 10
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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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14th July 2010
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Flat Track Racer
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Join Date: Jun 2010
Location: Central Coast, CA
Posts: 247 Sportster/Buell Model: XLHA the A is for AWESOME Sportster/Buell Year: 1982
Reputation: 96
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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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What are you talking about? Where you came from is gone, where you thought you were going to weren't never there, and where you are ain't no good unless you can can get away from it.
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14th July 2010
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XL FORUM TEAM MEMBER
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Join Date: Jul 2010
Location: Booneville,Ms.
Posts: 2,053 Sportster/Buell Model: XLCH Sportster/Buell Year: 1974
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You do know to ck end gap on the rings right.
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Murphy's Law 
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14th July 2010
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Senior Chief Know It All
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Join Date: Jun 2007
Location: l'escarene
Posts: 867 Sportster/Buell Model: xlch Sportster/Buell Year: 1975 Other Motorcycle Model: triumph bonneville Other Motorcycle Year: 1977
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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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14th July 2010
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Biker
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Join Date: Aug 2008
Posts: 6 Sportster/Buell Model: XLH Sportster/Buell Year: 1981 Other Motorcycle Model: Triumph Other Motorcycle Year: 1969
Reputation: 10
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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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14th July 2010
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Know It All
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Join Date: Feb 2010
Posts: 196 Sportster/Buell Model: xl Sportster/Buell Year: 1980
Reputation: 67
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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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If you cant ride there......why even go!
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