Joe Sayers and Matthew Fisher shone for Yorkshire as Leicestershire lost the Second XI Trophy match by 57 runs at Grace Road.
Sayers top-scored with 91 as Yorkshire posted 248-6 from their 40-over allocation while Fisher picked up 6-25 as Leicestershire were dismissed for 191.
The left-hander shared positive stands worth 83 and 103 for the first two wickets with Jonathan Tattersall (33, 45b) and Dan Hodgson 53 (61b) respectively as Yorkshire progressed to 186-2 after 31.4 overs.
Rob Taylor (7-0-46-1) and Michael Thornely (7-0-31-1) accounted for Tattersall and Hodgson and after Sayers sacrificed himself in a run out, County hit back with Matthew Hoggard (8-0-34-1), Nathan Buck (8-0-50-1), Anthony Ireland (6-0-31-1) taking wickets.
But Yorkshire, who were aided by six penalty runs because of a slow over rate on a glorious afternoon at the home of Leicestershire cricket, still put a good total on the board.
County saw the required rate creep up as they were reduced to 55-4 in reply despite a good knock of 28 from opener Angus Robson.
Taylor and Ben Raine pulled things around as they put on 96 for the fifth wicket with the former Durham man moving to 50 at a run a ball. However, the rate was still high and Raine (62) and Taylor (35) fell in successive overs.
Fisher then returned and took three wickets in what proved to be the last over as Leicestershire fell short. The teams now meet in a Championship game at Market Harborough CC, starting tomorrow (11am).