Increased North American sales of side-by-sides and motorcycles spurred Yamaha Motor Corp. to record highs in revenue and profit in its first half. The company reported a 14.4 percent increase in revenue and 12.1 percent rise in net income to $416 million for its first half, which ended June 30. Yamaha's North American motorcycle sales increased 3.5 percent to 117,000. Yamaha's first-half bike sales in North American have remained fairly consistent over the past three years after jumping 42.5 percent in 2005. New cycle sales represent about 60 percent of Yamaha's total sales, according to the company's first-half report. Besides the U.S. gain, Yamaha said its new cycle sales rose in Asia by 18 percent but decreased in Europe by 5 percent. ATV sales were off in the U.S., although side-by-side sales were up significantly.