[lincpimp]

I would run a bec if you go over 3s. The internal bec will put out quite a bit of heat, even with 3s. Get a cc bec and disable the internal bec by removing the red wire from the quark rec wire.

General concensus is that the quark is only good to 5s. I run a 125b on 6s in my hyper8 buggy, but it is not geared high, and the buggy is light. So less load on everything.