Just purchased a new 2006 kdx 200 for my son. He has never ridden before but at fifteen and 6 foot fits the bike well. Is there a way to de tune the bike for a period until he gets comfortable riding. I have ridden dirt bikes as a kid and this one has tremendous low end torque that easily lifts the front wheel. I considered downsizing the rear sprocket but was curious about other modifications that may have worked. Appreciate any suggestions or comments. Thanks, Phil.