Three-time national champion Jay Springsteen, his stomach trouble now under control, is making a run at Ricky Graham, who leads the Winston Pro motorcycle title standings. The Lapeer, Mich., rider won his 31st title race two weeks ago and is now second to Graham, who has clinched the season's first-half leadership and the $10,000 prize for it. Third in points is Scott Parker. All ride American-made Harley-Davidsons.

Pro rally driver John Buffum, driving an Audi, outdistanced rivals by 23 minutes in winning his fourth straight Sports Car Club of America event. Only 37 of 72 starters finished the northern Pennsylvania contest.

Buck Baker, who voluntarily left Hoss Ellington's Grand National stock car team, caught on with Harry Ranier, who fired Benny Parsons. Neither driver had won a race with his former team. Parsons got a one-race ride in a UNO Buick but may be on the sideline for the Firecracker 400 July 4. He has won almost $2.5 million but a pair of thirds are his best finishes in his last 22 starts.

Making Cleveland's Burke Lakefront airport into a race track for the Budweiser 500 (kilometers) Indianapolis car race July 4 took 2,000 tons of steel, 3,200 tons of concrete and 300 miles of lumber. No one is sure of tire wear over the flat, usually abrasive runways. The 312-mile Championship Auto Racing Teams title race is the first in the Cleveland area in almost 40 years.