Ok sorry for my absense on this topic... I plan to buy the KB45-08XL 1600kv Brushless Inrunner http://www.hobbycity.com/hobbyking/s...idProduct=4937 for the car the problem is the shaft is 6mm and the pinion as you know 5mm... If ii run the motor and use a grinder to grind the saft to 5mm,is it a good ideea?
I will use two 3s lipo 5000 in series.
I saw this esc it says that it can handle max 200A... did anybody used one of this esc? http://www.hobbycity.com/hobbyking/s...dProduct=14500 i don`t need reverse,and the break is the original disk break from the revo.

Hello ABP,

I recently received a CC 1717 motor which happened to be the "air" version which also had a 6mm shaft. Well, since I have a few others I decided to have at the shaft myself. I took the motor apart and put the rotor in a cordless drill. Then I used a dremel tool with a cutoff wheel.

Technique is probably key here, but I held the cordless drill steady in my lap (facing outwards of course!) and while spinning the rotor, I used the cutoff wheel as if I were trying to cut the shaft down the center line, moving it back and forth as far down as I wanted to remove material. I had a 5mm pinion handy to check for tolerances as I went along.

The whole process took me about 20 minutes. Once I removed enough material (evenly too, I might add), I polished everything smooth with a polishing wheel on the dremel tool (rotor still in the cordless drill) and finally put a larger flat on the shaft to finish things off. Hope this helps!