A good place to start establishing credit and to land a bike is go on the web and apply for credit cards through major banks (ie Citi, Bank of America, Chase, Fleet, etc). A factor they look at is how often your credit report is pulled, as this is on your credit report, and they tend to look at this before giving you any. They tend to figure, this guy tried ten times last month and nobody gave him anything, why should we.
The trick is to apply to all companies the same business day, they will likely do the report the next day or two, and it seems to take as long for the checks to show up on your report.
Maybe you get approved for 3 $2000 cards, go use them to buy your bike, pay regular, and you have credit at that level. Then after say 6 months apply for a limit raise to pay off the other ones.
Another thing, the credit card companies rarely check employment history, and go by your good faith.
Just don't get stuck in debt from credit craze.
Stan