Bhurva Tank's five wicket haul and four from Chris Preston helped dismiss their visitors for 144 at Mill Lane, with Tank bagging 5-26 and Preston 4-29 to justify skipper Micky Riddle's decision to field first.
Sileby's reply wasn't straight forward and they were grateful to the experienced Joe Charity as the calming influence as he anchored the run chase with an unbeaten 57 to see his side home by three wickets and keep them in touch at the top of Division Two.
With two games to go, the 2s sit in fourth and are 22 points shy of second placed Ashby Hastings and 12 points behind third placed Loughborough Town 2s.
Sileby face eighth placed Egerton Park away next weekend, who still aren't mathematically out of the promotion hunt, while Loughborough face already promoted Thorpe Arnold while Ashby face already relegated Countesthorpe.