Star kept up their 100% Lowland League record at Yarrow Park with an emphatic win last weekend.
Selkirk went into the match on a high sitting second top of the league, unbeaten and having just defeated Spartans for the first time in 34 years.
Ritchie Maxwell gave the visitors an early lead and that was doubled when Jamie McHarrie scored from the spot. Just before half time Tommy Muir headed home number three.
Soon after the break Garry O’Connor pulled one back but Star were back on the offensive and it was no surprise when Lee Wells headed home to make it 4-1.
Selkirk coach Steve Forrest said he was “gutted” with the result.
“We have been a victim of our own success. Our kind of game is playing quick, fast football and playing at this pace twice a week for the past few weeks has caught up with us a bit, we were running on empty,” he added.