Chris Dougherty was the days top scorers as he hit 80 to help CIYMS maintain their winning start to the season.
'Doc' hit five fours and cleared the ropes twice on his way to 80 from 60 balls, helping the Belmont side reach 156 for 2.
His opening partnership with John Matchett has been one of the most consistent and productive in recent times and was worth 103 on Saturday - Matchett making a run-a-ball 42.
Lisburn were never in the hunt, the tone of the innings set by CIYMS skipper Nigel Jones (2-3) who struck two early blows.
Adam Berry offered some resistance as he hit three sixes in a top score of 34 in a disappointing 81 all out - wickets for Rajavelu, Matchett, Mulder and Cameron-Dow.
Elsewhere it was a day of failed chases, with Instonians surprisingly unable to pass a modest 88 at Stormont.
Shane Getkate took three wickets as CSNI made 88 for 8 - Corin Goodall (25) and Ross Adair (21) the only two able to get to grip with tough conditions.
Ben and Ross Adair grabbed three wickets each as Inst were held to 83, despite the efforts of Ben Rose (33).
Woodvale are the surprise package as they held their nerve to beat Carrick to gain their second win.
Ferhan Saeed hit two sixes in a top score of 28 but two wickets for Ali Martin and CJ van der Walt would have meant Carrick would have been confident at the half-way stage of passing 114 for 7.
The dismissal of George Munsey second ball by Stephen Bunting (2-19) put a dent in that confidence, and despite 44 from Van Der Walt, Woodvale closed out a narrow three-run win.
As in any close contests both sides will look at turning points, one of which was the dismissal of Ryan Eagleson to a full toss, was one he clearly felt was above waist height. On such fine margins are games won and lost.
The final contest saw The Lawn witness another thriller, this time Waringstown coming out on the right side, beating North Down.
James Hall (48) and Morgan Topping (28) were their main scorers in what looked a modest 118 for 5 - Ruhan Pretorius (2-12) best with the ball.
Pretorius (38) and skipper Ally Shields (45) added 81 for the second wicket after the early loss of Adey, but the pressure of a chase told as the middle order wilted.
Kyle McCallan and James Mitchell bowled well at the death, each claiming two wickets in a six-run win.
SCORECARDS AND TABLE