I bought my 2007 Sunl 150 cc scooter last yr & the head lights were aimed tree-top high. I finally removed the front area in which the head lights are located & quite by chance noticed a recessed hole in the black housing that holds the lights. Deep in the recess of that hole is a phillips head screw. I inserted a screw driver into the hole & gingerly turned it to see what would happen. Presto! the headlight assy moved. So, turning the screw clockwise lowers the light beam.

I looked in the forums extensively last yr to find info pertaining to this adjusment but did not find any that related to this Sunl model. So I thought I should post it, to add to the knowledge base.