It was Side's first win in the league since October, ending a run of eight league defeats in a row.
Roddy Lemba put 'Side after 20 minutes. Shortly after Ryan Imbert made it 2-0 on 34 minutes. It was the forward's first goal since rejoining the club on loan from Witham Town at the end of December.
'Side made it 3-0 shortly after the restart when Burnham's Scott Plumm scored an own goal on 52 minutes.
In the final 15 minutes goals from Mattheus Santos and a second strike from Lemba, added further gloss on the victory.
Even a consolation from the hosts four minutes from time couldn't spoil what was a great day for Michael Walther's men.
'Side: Ryan Karrer, Aaron Hunwicks, Ricardo Bailey, Michael Bottone, Joseph Huston-Mendy, Euan Taylor-Reid (Bradley Joseph), Roddy Lemba, Kofi Billzy (James Briggs), Ryan Imbert (Mattheus Santos), Jayden Mitchell-Brown, Ben Clarke
Sub Not Used: David Etcheri