Could be wrong, but that looks like the ZongChen logo. And perhaps the 27 means 27mm intake valve? So it could be a Chinese 27/23mm BVH. Just a guess.
firepower354 said:23/20 valves in the e22? Stick a TB piston in it and you'll be impressed. R stage will NOT clear.
This cam: "SHORT"_68MM LIFAN ZONGSHEN JINCHENG RACE_CAM (MOST_50_70_90CC) (200147)
TB spring kit has new shafts, rockers, springs, everything to button it up new.
A little porting is plenty.