Now, now. Calm down and watch your language.
There is weight for the following ways.
1. Weight is the only reason why "ALL" mechs are balanced.
2. Without weight= big chaos.
3. Mythical users will be almost unbeatable! (almost)
That's all. But I am pretty sure mods will make further explanation.
However, I can give some suggestions to make your mech light.
1. Use the 1 kg teleport mark I. (it only costs 3.5k credits)
2. If that's still not enough, try using the 7 kg. charge mark I. Only costs 3.5k credits as well.
PS. My mech is exactly 1000 kg and I kill alot.
4. Use Regeneration Modules if possible.
5. Only use the needed items for your mech.
And by the way, I also have some good stuff in my inventory but I can still use it. Because I done those procedures that I've stated.