Might be a stupid ? But ask anyway how do you know when the balance shaft is going bad in the motor and how bad is it to remove it I heard alot of differnt things

 

the balance shaft itself probably isn't going bad, one of the bearings pressed into the block is pobably the point of failure. It doesn't seem to be a really common problem though.
Changing/ deleting the balance shafts is not going to an easy task with the motor in the car, and probably not possible without some special tools for the balance shaft bearings. And to get enough room to do all of that you are gunna have to lower the motor down really far, or just yank it all the way out.

 

Send off an oil sample