That motor's a little small for a Vendetta I think. The Vendetta uses 28mm diameter motors. That motor is 20mm. I don't think that little guy will be able to handle the heavier Vendetta without overheating. It's even shorter than a mamba 25 motor by 5mm, and I'm pretty sure even those guys have issues with the larger minis.

If you are set on using that setup though, I suggest starting with the smallest pinion, and working your way up. You probably won't be able to run too large of a pinion with that motor at all. Now that I think about it, I'm not sure how it's even going to bolt up to the Vendetta's motor plate either.