I sent an email to Bali Quad Bikes to find out if they had novice type trips, basically because I am a big chicken and some of the photos on the Bali Quad site looked a bit too scary for my liking. (The ones where they were going down a creek bed in particular). Anyway, they came back with a really nice email letting me know that there are bikes for scardy cats like me to enjoy and they have recently started Bali Buggy which looked really great as well.
Anyway, thought you might like to see the website.
M