2011 piston?

[mikemoto]

I was thinking about putting a wiseco piston in my 2011 and they only have a part number for the 2004. Has the piston changed since then?

[GMP]

All years are the same.

[twowheels]

Originally Posted by mikemoto

I was thinking about putting a wiseco piston in my 2011 and they only have a part number for the 2004. Has the piston changed since then?

Mike: Are you riding a 250? I have a S3 "A" piston here for the 2011s.

[mikemoto]

Yes 250. Whats a s3a piston?

[twowheels]

S3 is a company that supplies performance parts to GasGas (high comp heads etc).

Sizing is listed as "A 66.33" which is the standard dimension. GasGas lists an A, B, and C piston.

Piston is pin-stamped "S3 Vertex" and features anti-wear coating. The kit comes with piston, rings, clips and pin.

[mikemoto]

Can you pm me the price?

[gassi]

Originally Posted by GMP

All years are the same.

A little off-topic, but can someone explain is there come changes for the EC 300's bore and stroke after year 2009?
If you look technical data for year 2009 http://www.gasgasmotos.es/en/previous-models.html bore and stroke is 72 x 72mm. But 2010 and 2011 EC 300's bore and stroke is 72,5 x 72,5mm.

And if you look part numbers for those same year bikes piston http://www.gasgasmotos.es/en/manuals.html then it goes strange: Part numbers are exactly same

Which one is wrong, part numbers or technical data?

[CACTUSREID]

MIKEMOTO,check the rear lower of your cylinder rt corner i think , to see if you need an a,b,c piston?

[Neil E.]

Originally Posted by gassi

bore and stroke is 72 x 72mm. But 2010 and 2011 EC 300's bore and stroke is 72,5 x 72,5mm. And if you look part numbers for those same year bikes piston: Part numbers are exactly same.

I'll bet the data is wrong and it's 72 x72 like it's always been.