Capital One Auto Finance offers motorcycle loans in the USA.

From their site:
We offer financing to people with various credit profiles. However, your chances for approval are best if your credit record shows the following:

• Prompt credit account payments
• Consistently paid bills
• No bankruptcies

Capital One Auto Finance, America's largest online vehicle lender, can provide you with hassle-free financing and a great low rate.

Here are some basic facts to consider when financing a motorcycle with Capital One:

• Minimum and maximum loan amount must be between $7,500 ($10,000.01 in Arizona) and $100,000
• The motorcycle must be titled and registered within 30 days of purchase

Please leave your reviews of Capital One here.