Hi can some one help me please I just bought the bike ran good then I finsh put on my aftermarket gauge the dude put on and I just finsh put the back on and unplug it still nothing no spark at all what do I do

Which gauge? May have shorted a fuse.

It is the main gauge with the tact and speedo

If the fuses are good, disconnect the Tach Wire and try.

Yes all fuse are good removed tach wire still no spark