As far as I know Honda never sold the Phantom 150 outside Thailand, what tells me that it's likely that they never made an English owner's manual or a service manual.
The engine used for the Honda Phantom 150 was the same as the one used in the Honda NSR150 SP, and I was told that you can get a lot of information out of the Honda Phantom 200 owner's manual.
I am trying to find parts,owners manual,service manual for the 150 Phantom Honda Year 2001.
Thanks
email dsteuart1@live.com