US motorcycle maker Harley-Davidson kept its 2017 outlook unchanged despite its first-quarter shipments hitting the high end of its forecast. The Milwaukee-based company's shares were down 5.5 per cent at USD 56.15 in premarket trading. The company, which commands about half the US big-bike market, said motorcycle shipments fell 14.7 per cent to 70,831 units in the first quarter ended March 26, compared with its previous forecast of 66,000-71,000 units. Harley said it continues to expect full-year shipments to be flat to down modestly. Harley's shipments have been hurt amid rising competition as rivals such as Japan's Honda Motor and Polaris Industries, which makes Indian motorcycles, cut prices to lure buyers forcing the company to offer dealer rare rebates on its 2016 motorcycles as an incentive to clear older inventories. Revenue per motorcycle fell about USD 342 to USD 15,526 in the first quarter, Harley said.