DALLAS -- Military shoppers can rev it up this summer with a chance to win one of four vehicles worth $37,546 courtesy of Kawasaki, Monster Energy and the Army & Air Force Exchange Service.In June, July and August, one winner each month will receive a Kawasaki KX250F motorcycle, valued at $7,749. At the end of the sweepstakes, one grand-prize winner will receive a Kawasaki Teryx 4 ATV, valued at $14,299.From June 1 through Aug. 31, authorized Exchange shoppers age 18 and older may enter the sweepstakes at ShopMyExchange.com/sweepstakes. No purchase is necessary to enter or win."Riding an ATV or a motorcycle is a great way to enjoy the summer with family and friends," said Air Force Chief Master Sgt. Luis Reyes, the Exchange's senior enlisted advisor. "Four lucky Exchange shoppers will win -- and entering is just a click away."Honorably discharged veterans who have verified their eligibility to shop can enter, too. For more information on determining eligibility, veterans can visit ShopMyExchange.com/vets.