Tommy Treacher, Mitch Griffiths with a brace - the second a penalty - and Jonny Allen shared the Tigers goals.
Yaxley made it five games unbeaten with a 2-0 victory at bottom club Irchester United, Scott Carter and Adam Rothery on target for the Cuckoos after Ricky Hailstone missed a penalty.
Sleaford Town collected a third win in succession 2-1 at home to Shepshed Dynamo, who took a first half lead through Lee Attenborough only for Joe Braithwaite and Liam Tunstall, with a last minute clincher, to turn the game.
New-look Quorn lost 2-1 after extra-time in their Leicestershire Challenge Cup visit to Evo-Stik Northern Premier League First Division South neighbours Loughborough Dynamo after leading at the interval through Kadeem Price, while AFC Kempston bowed out of the Hinchingbrooke Cup 2-1 at Thurlow Nunn Leaguers Saffron Walden Town after taking a first half lead through Ryan Smith.
Credit: Jeremy Biggs