Kipkirui opened his KPL goal account in the 26th minute after robbing Hillary Wandera of the ball before planting it into the top-left corner with the defending champions looking the more comfortable side.
Muchiri equalized for Gor Mahia in the 37th minute after Jackson Macharia had laid a through pass for him. The Harambee Stars midfielder turned and hit the ball with his weaker left foot to beat a largely untested custodian David Mapigano in goal.
Minutes later after Half Time Muguna doubled Gor Mahia’s lead from the spot after Wellington Ochieng was brought down by Gabriel Wandera.
Muchiri was at it again as he equalized for Tusker once more in the 61st minute. volleyed the ball into the net over an out of position Mapigano from outside the box.
In the 66th minute Momanyi added another goal when he headed past Mboya from a free-kick delivered by Muguna.
Muguna stretched the scoreline beyond Tusker’s reach when he scored in the 82nd minute, Boniface Omondi then put the game to an end with another emphatic goal, chesting down Muguna’s cross to thump beyond Robert Mboya at the stroke of full time
In other matches played on Saturday, KCB hits Sony Sugar 3-0 with goals from Dennis Odhiambo, Stephen Waruru and their former skipper Enock Agwanda.
At the Kenyatta Stadium in Machakos, Wazito, making a return to top flight needed a late penalty by Elvis Rupia to draw 1-1 with Nzoia Sugar while new boys Kisumu All Stars lost 2-0 to Ulinzi Stars with Enosh Ochieng grabbing both for the soldiers.