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1978 Yamaha Daytona 200 Kenny Roberts Motorcycle Champion Spark Plug Ad

Lapping it up with Yamaha. In this year's AMA Daytona 200, Yamaha ace Kenny Roberts ran a near perfect race. By lapping the 73 bike field. And then wrapping it up with a record 108.37 mph average. Sparking this great victory were Champions. The spark plugs most big world and U.S. bike champions use for super performance...