The bikes:  All Advantage Training Camp bikes are identically prepared Honda XR100s with an Engines Only 120 engine kit expertly installed by Engines Only technicians.  These kits bring the engine displacement to 120cc, and include carburetor modifications and a jet kit, as well as a high flow exhaust pipe.  The suspension is top notch as well: front fork kits from Lindemann Engineering turn the aenemic stock forks into real suspension pieces, and Works Performance shocks are installed on all the bikes as well. The instructors ride, test and evaluate each bike specifically to make sure they are all equal performers.  During the class, the instructors ride the same EO 120 trainers as the students, so you can easily compare your technique to the instructor's.  The increase in effectiveness of the training due to these costly prepared bikes cannot be overemphasized.  A stock XR100 has very poor, almost useless suspension, and does not give the non-novice rider the level of control necessary to learn the desired techniques.  The engine kit increases the horsepower by 50%, giving the bike just enough power that throttle-steering is possible, but not so much that a student can mask a lack of technique with horsepower.  The stock XR100 motor is not strong enough to steer with the throttle coming out of corners.  It is powerful enough to incur momentum-slides going in on the brakes, but that is not enough to learn the desired techniques. You can learn about as much on a good mountain bike as you can on a stock XR100.