FFT/PSD/IFFT analysis on single axis piezoelectric accelerometer signals for curb impacts
Filtering by zeroing out bins is not a recommended approach as it will introduce significantly more time domain ringing, as detailed here
Why is it a bad idea to filter by zeroing out FFT bins?
Consider using the firls function available in MATLAB / Octave or Python scipy.signal to design optimized multiband filters around your frequencies of interest.
However the frequency content will be driven by repetition in the data; if the actual application will repeat (or not) at unknown and variable intervals, any such filtering techniques will not be useful.