Following on from last night's comfortable 51-39 success over the Borderers at Armadale, the return leg at Shielfield was always likely to test the Monarchs' mettle.
But they passed with flying colours to take another big three points and put themselves above arch-rivals the Glasgow Tigers ahead of next weekend's double header.
Skipper Sam Masters was flawless, despite struggling with a broken right foot, and Australian compatriot Josh Pickering was also outstanding, beaten just once by an opposing rider all night. Reserve James Sarjeant also had his best meeting since returning to the side earlier this month from a broken shoulder.
Hearts exit on the cards for Josh Ginnelly
Lee Johnson addresses Hearts claims that Hibs over-celebrated derby equaliser
Steve Kean reaction as Hibs B bow out of SPFL Trust Trophy and Paul Hanlon gets minutes under his belt
Hearts B come up short against Buckie Thistle in SPFL Trust Trophy
Former Hibs goalkeeper Matt Macey struggles on full debut as Luton Town crash out of Carabao Cup
Team boss Alex Harkess said afterwards: It was very much down to the spirt. Early doors we had enough race winners but we weren't picking up the necessary points to get us into the lead. But the ones who weren't doing it they needed to step up and they put the effort in as they knew what was required to win us the match. James Sarjeant worked very hard for his third places and that was the difference.
"Sam is Sam. I think he is the best in the league. He is struggling with his foot, but what else can I say? He comes out and wins and when you're going into heat 15 and need a 5-1, would you have any other two riders in the league than Sam and Josh?"
Monarchs: Pickering 15, Masters 14, Andersen 6, Sarjeant 5, Thomson 4, Complin 2, Hook 0.