Gs500f Big bore

[OzzyRZ]

Gday guys.
I have been trying to find if there is a bigbore piston option out there for the later gen GS500f. I cant seem to find anything.
Surely someone has done a kit or grafted a piston out of something else into a GS.
Any help is appreciated

[cbrfxr67]

Was hoping there'd be an answer,... cricket cricket crickets,..

[Bluesmudge]

I know there were bigger bore race bikes people made back when it was more popular to track the GS500s. Some Wiseco pistons do work but I don't know any of the details. You will have to search through the forum. Most of those guys don't post here anymore.

[phlogistian]

Hey, fellers,
Big bore pistons for the GS are no longer available AFAIK. Wiseco used to make a 555cc kit (79mm bore) but they haven't been available for probably 20 years. I have a pair of the Wiseco pistons & I've considered sending them to someone (Arias, maybe) to have them duplicated, but I'm sure it would be quite pricey.
Basically, your only option is to send a stock piston to a custom manufacturer (again, Arias, for example) & ask them to duplicate it except with a larger bore. Best of luck & I'd like to hear how it turns out if you try that route.

[chris900f]

The 2-valve GS1100 was a popular platform for drag bikes, you would need to check spec's for the wrist-pin etc

[chris900f]

The 2-valve GS1100 was a popular platform for drag bikes, you would need to check spec's for the wrist-pin etc

I checked Weisco and it was a bust...also, I think the wrist-pin is 20mm, anyone know for sure?

[mikeg]

not sure of accuracy, but MTC Engineering indicate theirs are 18mm for all GS1100 years.

https://www.mtceng.com/pistons/suzuki/gs1100/