What is a better dirt bike Kawasaki or yamaha?
Both are the best choices as dirt bike. Its all up to you which one fascinates you. Personally I would go for Yamaha, I think their bikes are really amazing with a lot of features their design and engine capabilities are truly astounding. Yamaha R15
All new Yamaha bikes has been inspired from Yamaha sports bike and looks more attractive than the predecessor. It has got a lot of cosmetic uplifts along with some performance and handling improvements.
Heaps of different things come into play when you are talking best bike as what is best for one person may not be best for you. It depends upon how tall a 14 year old you are and what experience you happen to have on bikes. Both Kawasaki and Yamaha make good bikes or they would not still be in business and if buying second hand it is best to get the best bike that has done the least amount of work while being maintained well and for the least amount of money. That means you need to keep looking at ads and bikes and having patience.