Please tell me about these parts...

Hi there , I am having honda two wheeler ( honda aviator) , and I got these two parts damaged , so I replaced them , I want to know about these parts what are they called as ? and what are there uses in a two wheeler.

http://s16.postimg.org/hf3y85yjl/IMG_20140713_WA0000.jpg (http://postimg.org/image/hf3y85yjl/)

[img=http://s27.postimg.org/dritea81b/IMG_20140713_WA0001.jpg] (http://postimg.org/image/dritea81b/)

and this part ....

[img=http://s30.postimg.org/de3hkr1jh/IMG_20140713_WA0002.jpg] (http://postimg.org/image/de3hkr1jh/)


[img=http://s12.postimg.org/4q0dls40p/IMG_20140713_WA0003.jpg] (http://postimg.org/image/4q0dls40p/)

thanx in advance...