head from a 1P39FMB, fit on a honda xr50 botton horizontal/cd50

[Electrorange]

Does anyone know if a head from a lazer 5. 1P39FMB , will fit on a honda xr 50 botton end 50cc horizontal/cd50 engine. The honda has very small ports and i wanted to replace it with the 1P39FMB head but it has a vaccum line. any one know if it will work? Thanks