|Northampton Saints (16) 36|
|Tries: Kellaway, Dingwall, Francis, Naiyaravoro, Sleightholme Cons: Francis Pens: Grayson 2, Francis|
|Wasps (3) 17|
|Tries: Young, Bassett Cons: Sopoaga, Searle Pens: Sopoaga|
Teenage centre Fraser Dingwall marked his first Premiership start with a try as Northampton Saints proved too strong for Wasps at Franklin's Gardens.
Andrew Kellaway's touchdown gave Saints an early lead and they added two more while Thomas Young was sin-binned.
Dingwall and Piers Francis both went in at the corner before Young returned to the action to score following a maul.
Saints duo Taqele Naiyaravoro and Ollie Sleightholme then crossed, with Josh Bassett's reply only a consolation.
The win, only Northampton's third in the league this season, lifted them above Worcester Warriors - who lost at Bath - to eighth in the table.
- Rugby Weekly Union podcast - listen and subscribe here
- For the latest rugby union news follow @bbcrugbyunion on Twitter.
As well as players on international duty, Saints boss Chris Boyd was without a dozen more because of injury as they looked to repeat their Premiership Cup win at Wasps earlier this month, so 19-year-old Dingwall, George Furbank and Alex Moon all started in the Premiership for the first time.
But Wasps, who remain fourth despite the defeat, produced little forward momentum in the opening quarter and it was only in the final moments of the first half that Lima Sopoaga's penalty finally opened their account.
Naiyaravoro's power and strength made him a constant threat, and earned him the man of the match award, and he was denied a deserved try by the TMO after the referee obstructed a tackler before finally surging in from 30 metres on the left flank.
Sleightholme, the 18-year-old son of former Saints and England wing Jon, went over for his first Premiership try only moments after coming on as a replacement to cap one of Northampton's best displays of the season so far.
Their margin of victory would have been even wider had James Grayson not failed to convert the first four tries, although he did kick two penalties.
Northampton director of rugby Chris Boyd told BBC Radio Northampton: "Probably for the first time this year, there was more good than bad.
"I'm really chuffed for some of the young boys, who stood up and played really well, a lot of them in their first Premiership game for the Saints.
"We've been struggling to get Naiyaravoro into space, often with big guys you like to use them in the tight encounters, but he scored 15 or 16 tries last season for the Waratahs.
"Most of those were when you give him the ball with a bit of clear air around him, but there was a lot of good work done on the inside to create the opportunities for him."
Wasps boss Dai Young told BBC Coventry & Warwickshire: "It's simple, Northampton were good and we were poor. I was really disappointed with the performance.
"We're lacking any consistency in the way we play right across the board. We're making really fundamental errors which are going to mean you're not going to win many games.
"The first four times we had the ball we got turned over and we were giving penalties away so we ended up with long periods defending.
"It takes a good team to win when they're playing poorly, and we're not that good team at the minute."
Northampton Saints: Furbank; Kellaway, Dingwall, Francis, Naiyaravoro; Grayson, Reinach; Waller (capt), Fish, Franks, Ribbans, Moon, Wood, Ludlam, Harrison
Replacements: Marshall, Davis, Garside, Ratuniyarawa, Gibson, Mitchell, Burrell, Sleightholme
Wasps: Miller; Watson, De Jongh, Lovobalavu, Bassett; Sopoaga, Simpson; Harris, Cruse, Brookes, Rowlands, Gaskell, Johnson (capt), Young, Willis
Replacements: Harris, West, Cooper-Woolley, Myall, Morris, Hampson, Searle, Le Bourgeois
Sin-binned: Young (35)