What are these pistons?

[gs7_11]

Do these look like genuine Suzuki GS1000 pistons?

Why the grey coating?

If not Suzuki, what are they?

Thanks!

Edited November 15, 2018 by gs7_11

[Jaydee]

Don't know what pistons they are but the grey might be a ceramic coating to reduce heat saturation.

[Duckndive]

4 hours ago, gs7_11 said:

Do these look like genuine Suzuki GS1000 pistons?

Why the grey coating?

If not Suzuki, what are they?

Thanks!

Adding some dimensions would greatly help you quest along with better pic of one of the pistons

and what markings they have on the underside

[wraith]

They will have the Suzuki S stamped on the inside of they a OEM, look like suzuk I but could be kwak?

what's the diameter of the positions and size of the pin?

[gs7_11]

Thanks.

Yeah  I didn't want to go into too much detail, just querying the grey coating........never seen that before and wondered if someone had.

Seller said they are GS1000 and superficially they look like it, apart from this grey business.

However, on checking the measurements, they are 69mm bore (+0.5mm oversize) so clearly not GS.

What 8 valve engine has a 69mm bore? Not that it matters now.....

[Duckndive]

1 hour ago, gs7_11 said:

Thanks.

Yeah  I didn't want to go into too much detail, just querying the grey coating........never seen that before and wondered if someone had.

Seller said they are GS1000 and superficially they look like it, apart from this grey business.

However, on checking the measurements, they are 69mm bore (+0.5mm oversize) so clearly not GS.

What 8 valve engine has a 69mm bore? Not that it matters now.....

69mm would be 844cc in a GS750 ...so could be a #######o kit...if the pins are 1# mm

or they could just be stock GS850 pistons ....

 

Edited November 15, 2018 by Duckndive

[gs7_11]

13 hours ago, Duckndive said:

69mm would be 844cc in a GS750 ...so could be a #######o kit...if the pins are 1# mm

or they could just be stock GS850 pistons ....

 

Ah, GS850 seems a good shout. I've seen other pics and they do look like genuine Suzuki.

 

[gs7_11]

Here's a thing:

I bought these pistons, before I was told they were 69mm (+0.5). They were being sold as GS1000, quoting the right GS1000 part number. Turns out they were guessing at the part number and they were 69mm! Spoke to the vendor immediately, who said sorry, they're wrong, will cancel order and refund.

Two days later, they turn up, despite them saying they wouldn't send them. Loose, in a jiffy bag. Really. I mean, who chucks a set of pistons in a Jiffy bag with no other packing material so that they can rattle against each other all the way up here!

Next news, my refund has been done by e-cheque, so I have to wait 10 days to get my money back.

They don't want the pistons returned, so if anyone wants them for ash trays....

[johnr]

i wonder if thy will go in a set of gs750 or 850 liners? i might be interested in them if the price was right? i need to measure some stuff in the shed.

[gs7_11]

I'm pretty sure they're 850 pistons. 69mm bore, 1st rebore 0.5 oversize.

The price would be right, don't want much for them, but I haven't even opened the Jiffy bag they came (loose) in, so I don't know how badly damaged they are.

I'll have a look.

[gs7_11]

They're not too bad, here's couple of pics of them after their journey. Deffo measure at 69.5mm, so the best guess is GS850.