Fourth Dimension set a new Monticello Raceway track record of 1:58 for a 2-year-old colt trotter in winning the last of four $27,50 New York Sire Stakes splits on Monday afternoon. Six Pack (Ake Svanstedt) set the tempo in the race, clicking off fractions of 29 2/5, 59 2/5, and 1:29 2/5, but Brian Sears had guided Fourth Dimension, who was sent off as the even-money choice, first-over out of third before three-quarters, and he would join Six Pack on the front on the final turn.  Fourth Dimension took over the lead turning for home and held safe over a second-over Clive Bigsby (Jason Bartlett) to win by a length.  Tito (Marcus Miller) was third after a two-hole trip. The time lowered the previous track record of 1:58 2/5 that had belonged to Fashion Blizzard since September of 2012. Fourth Dimension is a Chapter Seven colt trained by Marcus Melander for owner Courant AB, who shelled out $200,000 for him at the 2016 Lexington Selected Yearling Sale.  Fourth Dimension is now perfect in two starts, both in New York Sire Stakes action, and he has pocketed $27,500.  Bred by Ray Schnittker, Steven Arnold, Blue Chip Bloodstock Inc., and Arden Homestead Stable, Fourth Dimension is the first foal out of the Muscle Hill mare Corazon Blue Chip, whose dam Gluteus Maximus earned over $263,000 before being exported to Sweden.  Fourth Dimension returned $4.20 to win. Sears also won the opening flight of the day with The Veteran.  Starting from post five, he took over the lead from Seven Knights (Jordan Stratton) at the 30 second opening quarter and went on to score by 2 1/4 lengths in 2:02 1/5.  Seven Knights held second, with Chasin' Dreams (Schnittker) up for third. The Veteran, a colt by Muscle Mass, has won both of his career starts and earned $16,625 for co-owner/trainer George Ducharme and co-owners W.J. Donovan, Stephen Michaels, and Jim Winske.  A $30,000 Lexington Selected Yearling Sale purchase, The Veteran was bred by Glengate Farms and is the third foal out of the Yankee Glide mare Tequila Slammer ($256,861).  The 1-2 favorite, The Veteran paid $3.00 to win. Don (Andy Miller) took the second section in 1:58 3/5.  He would get by 3-5 choice Cruising In Style (Anthony MacDonald) beyond the 29 2/5 first quarter, then fight off a bid from the people's preference when he pulled pocket before three-quarters.  Don would widen in the lane, reaching the finish line three lengths to the good over L Dees Courageous (Dan Daley), with Funknpancakes (Jim Morrill Jr.) turning a second-over trip into a third-place finish. Julie Miller trains Don, a Credit Winner colt, for owners Andy Miller Stable Inc. and Little E LLC.  Don, a $50,000 buy from the Lexington Selected Yearling Sale, broke his maiden in his third attempt and now has a bankroll of $16,955.  Don was bred by Tymal Farms and is the fourth foal out of the Angus Hall mare Angostura ($208,865).  He was the 6-1 fourth choice and returned $14.20 to win. The third division saw the biggest upset of the day as 9-1 shot Rich Uncle (Morrill Jr.) scored in 1:59.  Purpose Blue Chip (Daley) was on the point through panels of 28 4/5, 59 3/5, and 1:29, but Rich Uncle, who was third for the first three-quarters of the mile, rallied past him from first-over to win by a length and three-quarters.  Ronnie Goldstein (Kim Crawford) finished third. The victorious Credit Winner colt is trained by Ron Burke for owner W.J. Donovan.  Rich Uncle won for the first time in his career in his third trip behind the gate, and he now shows earnings of $13,625.  Rich Uncle, bred by Ray Schnittker and Royal Assets Stb, brought $95,000 at the Lexington Selected Yearling Sale and is the first foal out of the Donato Hanover mare Royal Assets ($466,884), a half-sister to millionaire Take My Picture (Classic Photo).  Rich Uncle paid $20.20 to win.