brand new  Piston kit for 

43mm bore size cylinder ( NOT for 50cc) standard engine

will fit to following  not for Standard engine 

for 43mm bore size cylinder 60cc cylinder kit 

Honda DIO Vertical type engine 

HONDA : DIO SP-SR - DIO ZX - SHADOW

SA50 & SK50 & SR50 after 1994 model year (AF18E,AF27,AF28 2T 50cc )

SYM Dio 50cc  Arnada 50cc, DD50,Jolie 50

Kymco: Fever ZX,DJ Refined,CX-CX SUPER - DJY - DY WORLD - K12

...etc Honda Vertical AF18E ~AF27 ,AF28 Engine.

***this piston for 43mm bore size cylinder only  

***not for standard engine 39mm bore.

please make sure your engine bore size before you buy it.