Hey Idk if I'm in the right spot but, I have a slash vxl 4x4 and I'm running a 8.4volt 5000mah battery on it. I'm noticing that it isn't as fast as it used yo be. It's my only battery and i use a fast charger from oynx. Is I lube my bearing on it every now and then so I don't think It's that could it be my battery. I use it at least once a day to let u know. Can anyone help me out?