MashAllah!!
Nice... As a suggestion, i dont think GS150's head light is gonna work fine on this bike...
Try finding its original lamp atleast.. GS150's head light is not designed to handle speeds, its for city drive hencce it cant amplify light enough... The lense inside it would not throw beam far enough, plus if u will try to fit HID in it, its poor plastic lense and mirror would melt due to heat...
Hence u need a proper head light with glass lenses... that enhance and throw beam pin point at a long distance...
Dont compromise on safety buddy! U wont want to hit a pot hole doing 100+ at nights... be safe!