Having elected to bat after winning the toss, the Flames were bowled out in 43.5 overs for 169.
Opener Paul Newman set the tone with an explosive 66 from 63 deliveries, highlighted by nine fours and one six.
Newman and fellow opener Miller Griffiths (34) put on 105 for the opening wicket before Leitchville-Gunbower worked its way back into the contest.
From 0-105, Kyabram slumped to 5-133 with Josh O’Shea (2-29) and Simon Tatt (2-38) making key inroads.
As wickets fell around him, Jake Gascoyne steadied the ship for Kyabram Fire Brigade, with what would prove a telling knock.
Gascoyne scored 29 from 58 deliveries, helping lift the Flames to a competitive target.
James Keath tore through the middle and lower order, claiming Gascoyne’s wicket and a few others on his way to figures of 4-23 from 8.5 overs.
But any momentum generated by the fightback with the ball was diminished in the early stages of Leitchville-Gunbower’s batting.
Jackson Barnett claimed the key scalps of O’Shea and Austin Windridge in as many balls to have the home side 2-1.
The redoubtable Rob Salter soon made it 3-16 when he bowled Billy Hawken and when Liam Keath (eight) departed, LG were 4-36.
Opener Tyler Jones found a willing ally in Jye Keath, the pair setting about rebuilding the innings with a 66-run stand.
Brenton Sheppard had the golden arm though, claiming both.
Jones scored an impressive 64, a knock highlighted by six fours and a pair of sixes.
Keath’s departure after a determined hand of 28 (from 75 deliveries) basically sealed the points for the visitors.
Kaine Herbert (3-22) and Jackson Barnett (3-22) enjoyed the most success for the Flames, with Sheppard’s spell (2-29) the game-changer.