Thats like optimal temperature IMHO. Thats when they really seem to shine. They will quickly warm up to 120ish and stay there rather than keep climbing if all is well, I wouldn't worry. If it doesnt move past 125, I'd say they are healthy and it isnt going to get really higher than that. Take a cold (60 deg.) lipo and compare it to one thats 120. The 120 degree one will output more punch. I'd start to worry if it was hittin 130 and climbing on a regular basis. I'd say you could go for bigger batteries. At least a pair of 6000s for vxls, from what I've seen, they will take whatever you throw at it. Motors seem a bit hot, either gear down or get a fan/heatsink for that if you could.