Piston ring question ....

[tunneruk]

Guys,

I'm just about to fit a pair of brand spanking MITAKA pistons in my 250LC.

Having taken them out the box I find the usual rings, gudgeon pin and circlips etc ..

But there is also a thin convoluted spring ring which appears to sit behind one of the main rings. I've never encountered a ring such as this so I thought I'd ask you guys here!

What's it for and which ring does it sit behind?

It's pictured here ... www.ebay.co.uk/itm/YAMAHA-RD250LC-RD-250-LC-MITAKA-0-50-PISTON-KIT-/220810576402?pt=UK_Motorcycle_Parts&hash=item3369560212

It's probably a schoolboy question but I'd appreciate the heads up!

[Norbo]

first £55 im gowing to have to rethink the £40 i charge for them .

Its the expander ring some people dont bother fitting them . I do not realy esenshal but they come in the kits so i allways fit them . but if i did'nt have them i wouldn't worry about it .

[midlifecrisisrd]

it goes behind the lower ring

Steve

[Deleted]

why would they pay 55 when you sell them for 40, thats plain nuts, i dont get that one,

[tunneruk]

Nov 28, 2012 11:02:11 GMT 1 @ken007 said:

why would they pay 55 when you sell them for 40, thats plain nuts, i dont get that one,

Who said I bought mine from Ebay? I only used the photo as it was easy.

Cheers for the replies guys, Pistons now fitted (with the expander rings fitted)

Hopefully get the engine back in and up and running tomorrow!

[steve h]

Hope she runs ok. (and its not a schoolboy question, it does no harm to ask)

[Norbo]

Nov 28, 2012 17:45:30 GMT 1 steve h said:

Hope she runs ok. (and its not a schoolboy question, it does no harm to ask)

Very true ther are no silly questions just questions you dont have an answer to. and this question gets asked a lot

[bare]

Expander rings are Mandatory. These help/stop the piston from rattling/sounding like rocks in an empty beer can.. in the bores.