Haven't looked at your first link but that second one is cool. The bike handles really well and the music is a good mix..... if someone explained it to me i would think they were mad.
In fact, AFAIK Free Rider 2 is now called Canvas Rider.
It's also available on the Google Chrome Webstore. I found it there while looking for some cool games for my Chrome and was surprised that it's so similar to a game which I remember (this ofcourse )
The homepage has lots of tracks available to play instantly, without the need to copy strings of codes into it.