hi...if any body could help please..?

got questions here...I already have this xerun v.2 60A speedo...and installed the 422 stock software..running 11.5T.....awesome !!!! .....from out of the box i see the silicon wires seems too small....i thought it's 14 awg(correct me if i am wrong)....if i change into bigger one with 12 awg for the motor only (the 3 wires) ....is there any different on performance ? is there any different if i don't put the original capacitor ? or if i replace it ? 25v 470mf into 16v 1000mf ?

thanks
Bijono