Another way to referr somebody, would be to email the thread to a friend. The link is at the bottom of each thread [Email this page].

The output of this email includes this text:

I thought you might be interested in reading this web page:
http://www.bikeforums.net/showthread...3&referrerid=3

From,
Joe Gardner

As you can see, that also includes your referral ID number. The referral cookie is good for 1 year, if the member comes back and registers in a year, you will get the credit.