Standard & Poor's stated on Friday that it could lower its ratings on Harley-Davidson Inc. due to a weak motorcycle market outlook in the United States.

S&P has an A corporate credit rating on Harley-Davidson which covers about $2.1 billion in debt, according to Marketwatch.

S&P said it will have a meeting with the management of the company in order to evaluate the company's plans to face a possible worsening demand of its products and its effect on credit quality, the source reported.

Shares of Harley-Davidson closed today's session rising 4.63 percent to $37.76 a share in the New York Stock Exchange.