YX 150/160 CRF type head

This Type head allows the use of CRF50 and Lifan type intakes and Exhaust pipes
the easy features to notice are the intake port is nearly flat on top just like a CRF50 or Lifan type engine
also the Exhaust studs will be 6mm

YX 150/160 , ZS155 ,TB V2 & Takagawa +R

(KLX type)

This type of head has klx110 type ports , 17 deg rear slant on intake and 8mm head studs
accepts KLX110 type intakes and Exhaust Pipes

Here is some info on the cam covers too