buy a Giovanni kit bike and follow the instructions
it depends, what brand is it
honda Husqvarna also makes a dirt bike!!!
husquvarna
the one you maintain the most
Excel rims.
Scott and Cannondale!
75-80 kms per hour tops.
Suzuki and Kawasaki are top on the list.
Brand wise, it is KTM. The make a wide varity of dirt bikes in both two and four strokes. They have everything from kid's bikes to enduro bikes to MX bike. They are by far the best.
They are quicker and more powerful and are like the Ferrari of the dirt bikes and are built for speed and racing and the Honda is like the Holden and Ford and is a basic dirt bike!
the best boot brand is alpinestar but they are veryy expensive. they run way over 400 dollars.