safe to run a 1717 on 4S in a truggy? pics included

Here is a video of it running on 4S last weekend during a practice session. I forgot to time this run. Then later when I was prepared to time my 6S run, I crashed on broke the right rear a-arm on the second lap.

http://www.youtube.com/watch?v=y4CV2k60svE

When I placed my order, I did it very spontaneously in response to the big motor sale. I know now that I should have gotten the 1520 motor instead, but I was trying to get the lowest kv rating I could.

I need to get some quality Hyperion 3S batteries to be certain and do a timed run. For now, I'll have to use the Zippy packs I do have to test. I don't mind a heavy truck, as long as I can make it handle and last the distance.

ben