Larson was 8 of 14 from the field, 6 of 6 from the free-throw line and had seven rebounds and four assists for the Coyotes (6-8). Kasperbauer hit all of South Dakota's 3-pointers, while James Hunter added 15 points and Brandon Bos had 10.
South Dakota, which shot 50.8 percent from the field, closed the first half on an 11-2 run sparked by two baskets from Larson. Kasperbauer added a pair of free throws and a 3-pointer to help South Dakota take a 10-point lead at the break.
Kasperbauer hit six of his 3s in the second half as the Coyotes coasted the rest of the way.