gs425 / gs850 pistons interchangeable

[psyguy]

hi everyone

i've been looking for oversize pistons 1.0 for my 1980 gs850
- the part number is:
12111-45110-100

i am wondering if the pistons from the gs425 might actually be the same thing
- the part number is:
12111-45100-100

maybe someone has one of those books that tell you what parts are interchangeable? or know from experience?

425 is a 2 cylinder engine and 850 is a 4 cylinder so the numbers kind of work out that the cylinder sizes may be the same, i think.


help greatly appreciated, as i am unable to find gs850 pistons but can get some gs425!

cheers everyone

[humhead]

The 425 pistons are too small. stock bore is 66mm. 850 pistons are 69mm.

[mark]

Call here. Ask for Jeff ext. 111

http://www.z1enterprises.com/

I just went through trying to find oversized pistons for my '79 850. 1st oversized piston are available, (I just recieved mine last month) but the confusion is that they are sold as a set (piston and rings together) with a single part number, and sometimes that confuses the parts guys. If you continue to have trouble PM me or something and I'll get you the part number.

[psyguy]

The 425 pistons are too small. stock bore is 66mm. 850 pistons are 69mm.

thanks for the detailed answer!
so, i'm back to square one, trying to find two pistons 1.0 for gs 850. these are proving really hard to find...

[psyguy]

Call here. Ask for Jeff ext. 111

http://www.z1enterprises.com/

I just went through trying to find oversized pistons for my '79 850. 1st oversized piston are available, (I just recieved mine last month) but the confusion is that they are sold as a set (piston and rings together) with a single part number, and sometimes that confuses the parts guys. If you continue to have trouble PM me or something and I'll get you the part number.

thanks

that also explains the higher price on 0.5 pistons!

but i actually already have all the rings and two pistons 1.0 so i really need to get just two more 1.0 pistons.
would you know who might have them?
i emailed quite a few places with no luck
cheers

[mark]

would you know who might have them?
i emailed quite a few places with no luck
cheers

Seriously. Click on the Z1enterprises site in my previous post and give them a call.

[focus frenzy]

the 1mm over pistons are still available for the 850, pistons for the 425 are not available from suziki in any size.

when I rebuilt the top end on my 1000G 6 years ago .5mm over pistons were not available any more but I have just discovered they are back available now.

[psyguy]

Seriously. Click on the Z1enterprises site in my previous post and give them a call.

sent them an email but they recon they don't have them

might have found some at anderson-vintage-parts

thanks

[SqDancerLynn1]

Anderson parts----- check the deadbeat section

[Suzuki mad]

Try here.

http://cgi.ebay.co.uk/Suzuki-NOS-GS850-Standard-Pistons-GS-850_W0QQitemZ120112067732QQihZ002QQcategoryZ10534QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Suzuki mad

1981 GS1000ET
1983 GS(X)1100ESD
2002 GSF1200K1