Big Bore PCX125 eSP with PCX150 head?

[Xedos9er]

Hello guys,
i want to upgrade my cylinder in my pcx125 eSP to a big bore kit (178cc).

Does anybody know if the OEM PCX150 cylinder head fits on the PCX125eSP Cylinder?
I´ve read somewhere, that the PCX150 Head has bigger valves, is this true?
If yes, what parts do i need to swap this head?

My target setup:
-178cc big bore
-PCX 150 head with valves
-Yuminashi camshaft + yuminashi ex/in rockers (are these oem PCX150 rockers?)+ 2 Valve springs
-PCX 150 27mm throttle body
-upgrade variator

I hope somebody can help me

[Mgalutia88]

Yes the 150esp head has larger intake and exhaust valves and is a common upgrade for 164cc and larger big bore kits.