LED light problem?
 

So the last owner of my cbr took the stock rear turn signals off and wired some type of led lights onto the stock back light. The two backlights barely light up when I brake and you can barely see each one lighting up when Im signaling. Also the front turn signals are flashing too fast.

this is basically what they look like, http://www.xdcycle.com/discount-moto...als-lights.jpg,

they both serve as the backlight, rear and turn signals. I don't mind the set up as long as the leds are bright enough people can see i am turning, and the front turn signals are at a normal speed. What can i do? can i replace the led with brighter ones?