A strong defensive Southcity effort has given the Bulls a handy buffer in second place on the Group Nine ladder.
Young would have moved into second with a win at Harris Park on Sunday, but struggled to make inroads against the Bulls for the third time this season.
Besides a 10-minute period after half-time, Southcity were by far the more clinical of the two teams and took their chances while Young struggled to complete.
Captain-coach Nathan Rose was more than happy to bank another two points.
However he is still searching for more consistency from the side.
"It was good to get the win but at the start of the second half, probably because we were in front on the scoreboard, we forced our hand a bit," Rose said.
"We just to start those second halves a bit better."
It was the opposite to how they started the contest with Daniel Foley and Rose getting over the line in the first 16 minutes.
The Bulls took the 8-0 advantage into half-time before Young were able to dictate terms to begin the second stanza and scored through Jayke Hogan.
However a mistake coming out of their own end minutes later proved to be a turning point.
Instead of controlling things after Inoke Vunipola was ruled to have knocked on in the play-the-ball, Young cracked as Kyle McCarthy put Tim Hurst into a big gap.
Southcity then profited off another controversial call when he judged Tyler Cornish to have played the man not the ball when trying to bat back a short restart.
McCarthy added to their lead with the resulting penalty goal before some brilliance from Rose sealed the win.
First he stripped the ball from Cornish 30 metres out from the try line before his bouncing kick found Connor McCauley five plays later.
The win gives Southcity a four-point buffer on Young and leaves them two points behind Tumut, who they play next month.
Rose is pleased with the way the team is tracking.
"We chanced our hand and were probably a bit unlucky on a few opportunities," he said.
"If we had of worked that little bit extra we probably would have got something go our way but at the end of the day it is just pleasing to get the win."
However Young coach Nick Hall is looking for more from his side as they struggled to stay in the hunt.
Plenty of errors released any pressure they were trying to build on the Bulls and it's one thing he's looking to address ahead of a trip to Twickenham on Saturday.
"We just have to find a way to compete, stay in the fight and be more patient," Hall said