wowiesy,
so you have already bought a bike? how much is your budget?
i suggest you get something that is comfortable (not a sportbike i.e. GSXR, ZZR, FSR, VFR, etc.) due to the bad traffic & road conditions in mmla.
for 2nd hand bikes, try visiting www.manilabikes.com, for forums www.motorcyclephilippines.com