@xulfiqar
ap kay sawal say agree karta hun kay 125 mein pressure valve :S
jahn tak mjhy pata hai us mein CAM,ROCKER,TAPPETS,VALVE normal wohi STICK walay;) aur aik adad piston chalta hai head mein 
@topic poster
aik bht acha mashwara hai tmhari bike new hai to means sealed chamber + head.....bhai us engine ko as it is utar kar rakh do aur HONDA EXCEL 180 ka engine dal do 125 par bolt on fit hai cost around 12k in karachi complete engine wdout carb...... aur mazay karo hawao mein uro 