hello friends,
                  can i use this motor on my quad which weights around 1200gm??
http://www.leaderhobby.com/product.asp?ID=9394001220779
or this?
http://www.leaderhobby.com/product.asp?ID=9394001223899
please suggest best motors for my quad.
my budget is below 50dollars.please suggest me one.
   thanks in advance

motor should be less than 1000kv .Both of your motors are good from links given info.

but i would personally suggest the following dt700 or dt750 they produce around 950g of thrust on 10x4.5 props consuming around 13amps at max. , really powerfull .And if u wanna 4 motors for your quad they are well under $50 ,total of more than 2700g of effective thrust for your 1200g quad. check the link.

http://www.hobbyking.com/hobbyking/store/__6246__hexTronik_DT700_Brushless_Outrunner_700kv.html