Anybody Into physical culture?

I've started gaining weight again over the last couple months after a long period of consistent loss (120kgs down to 108). I was gradually ramping up the kcal intake trying to identify my maintenance level which seems to be around 4000kcal at the moment.

For someone who weighs 100kg+ , 4000kcal is definitely not maintenance. This is the reason you losing weight. 4000kcal might be a good number if you were chillaxing all day, but your doing strength training, BJJ & bike riding. Double it bro!

If your careful to only have carbs post-workout, a 10,000kcal diet will not even make you fat. Mike Phelps downs 12,000 during training/competing.