Question about 2007 Yamaha XT 660 R

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What piston ring goes in the top groove shiny or dark

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  • Douglas Hansen
    Douglas Hansen May 11, 2010

    The top ring might have a dot or a "t" on it.

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Shiny on top then dark ring in middle groove all marking face up.

ring groove

Posted on Mar 27, 2010

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Posted on Jan 02, 2017

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Ring end gaps for B&S 31P777 engine


If the engine the figures are required for is a re-ring using the original pistons it is important to check the amount of wear of the bore and of the piston groove clearance.

Once the ring gap is set to the minimum at an unworn part of the cylinder bore the gap should be rechecked at the most worn part and if the gap exceeds the maximum it indicates an excessively worn cylinder bore.
While this is not immediately detrimental it does mean the piston ring grooves will wear much more quickly and the job will have a shorter life and in some cases a high oil consumption can be worsened.

The piston ring groove clearance - side clearance between the ring and the piston should be 0.0015 inch maximum. It can be expected the top groove could be considerably worn and in that case new pistons would be beneficial or a Cord ring set.

Sep 11, 2017 | Cars & Trucks

1 Answer

I'm replacing piston ring on husqvarna model 240 chainsaw. I would like to know if bevel edge on ring ends face up or down on piston


Most 2 cycles have a pin in the piston groove that keeps the ring from traveling. The pin location (upper groove, lower groove position) will give you the indication. Most 2 cycle rings have an L shaped cut in the very end that mates with the pin in the groove. Otherwise the piston/ring assembly will not fit into the cylinder.

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

Mar 26, 2017 | Husqvarna Garden

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On a 4 ring grove piston, does the 3 piece oil scraper rings go o the 3rd or 4th grove?


Oil ring assembly always goes on the bottom. You really can't make a mistake there. Oil groove is always much wider than any other ring groove. Stock pistons with 4 ring sets????

Jun 13, 2011 | 1989 Plymouth Acclaim

2 Answers

Hello im having a problem repairing my pistons and rings on my motor bike. can you plz tell me if the piston rings are supose to spin all the way around or are they both ment to lock in the groves for them


howdy.if your bike is a two stroke the ring has a pin in the piston groove to stop the ring turning.on four strokes the ring gap should be off set to each other and generally placed between 20-25 past and 25-20 to [like a clock] but no where near the side of piston at little end pin.also use a little oil in grooves to lubricate while fitting rings.some rings have angled edges so check wether they go top or bottom directions in manual or packaging with new ring sets.most rings will be marked to guide you.have fun and good luck.cheers

Mar 21, 2011 | Yamaha DT 125 RE Motorcycles

1 Answer

How do I install the compression ring into the cylinder of a sears model # 919165140?


Similar to an automotive seal, if it has a beveled edge it should down. Place the ring on the piston groove (don't worry), it should look like the ring is side by side with the piston. With that in place, roll the ring along the groove, making sure the opened end flings on top of the piston. While rolling the ring along the groove, it should end up screwing it's self into position on the piston groove. Start from the bottom grove if it has multiple scrapers.

Other way is buy a ring spreader tool and a compression tool from any auto parts store. This will come with instructions and you'll get the hang of it in no time.

Jul 23, 2010 | Craftsman Air Tools & Compressors

1 Answer

What is the piston ring gap clearance for the ford laser


Which Piston Ring Gap? First of all you need to purchase a Hayne's Manual for your car. It will give you the specifications under the Engine section of the book. The piston has three rings on it. From the top you have your first compression ring, then your second compression ring (these "clearance" specifications or "gap"), should be the same as measured on the piston insofar as the clearance between the "lands and grooves" or between the ring and the piston groove. The third ring is your oil control ring which will have a different clearance between (for example), the top of the ring installed and the piston's groove. Then lastly, you need to place the compression rings and place them in the bore of the cylinder WITHOUT being installed on the piston. A measurement is then taken between the opening gap of the ring while in the block. To make sure it's lined up properly, invert a non-ringed piston down into the bore from the top to make sure the ring is installed at the same depth all the way around.

If you don't want to buy the Hayne's Manual, just stop by your local Dealership and get the Specifications for the two compression rings, the oil ring and the "installed" clearance or gap on the rings.

Hope this Helps,

~00 Buck~

"Still living on the Right Side of Dirt..."

May 18, 2010 | Ford Laser Cars & Trucks

1 Answer

I had to replase the piston and fogot how to put it back togther


Put the piston in with the mark on the top of the piston facing the exhaust port of the cylinder. put one circlip in the piston in the bore seated correctly in the groove. place piston over rod facing correct direction and insert wristpin into piston and through the rod needle bearing in the top of the rod. insert other circlip and seat correctly in groove. install compression rings with letter or any markings facing up. markings usually located at end gap on either side. install oil ring with straight ring on top squiggly ring in center and straight ring on bottom all in the same groove which will be the lowest groove on the piston.stagger all the ring end gaps. do not let all the gaps line up. install base gasket on engine case. clean everything and make sure everything stays clean. slide cylinder over piston and compress rings with fingers and finesse cylinder over piston. do not force. put nuts on studs and tighten to spec in service manual. install head gasket correctly and put head on and put nuts on studs. tighten to spec. reassemble rest of motorcycle and get hurt! have fun

Jul 28, 2009 | kawasaki KX 250 Motorcycles

1 Answer

Piston rings positions


Hi johanjur
It is important that the rings all go in the right way up and in the correct order. The ring with the shiny edge may be tapered, the shiny edge then should be closest to the top. Check the rings themselves. There are often markings on them, and they generally face upwards. Hpethis helps you. Cheers
regards robotek

Jan 25, 2009 | 2003 ATK 125 4-stroke

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