What engine should i get???

[Thumpstar Scum]

im in the process of gettin a new motor but i dunno what to get i had a lifan 125 previously, and want a bit more power what do u guys reckon???

are those race gpx 125cc from dhz good??

 

[motovert24]

are those race gpx 125cc from dhz good??

awesome engine! i've got one before i had 2 jianlings and the gpx is way faster then the old one
about 7 seconds faster around a track at broady too