When i bought my bike it came with these parts in the trunk. heres a photo of them. I want to know what has been replaced.

 

The bottom piece looks like you front sprocket

 

I think that the top peice goes on the rear axle and is used to adjust the chain

 

The star-shaped thing on the left is the pulse generator rotor. It was probably replaced with an aftermarket piece that advances the ignition a couple degrees. The black rubber pieces are grommets that hold wires to keep them from chaffing. Probably forget to replace them somewhere.

 

All i can make out is the front sprocket as well....

 

hi the rubber holders are for either braided hoses such as rear brake pipes etc and are also used for oil cooler pipes to stop them moving around

 

I would guess you have braided rakelines on the front. Those are the same parts I removed when I removed when installed my steel brake lines. (the 2 rubber and metal pieces)