Hints and tips

So basically I am almost 16 years old and looking for something fun to do on weekends. I have always thought about a dirt bike or go kart. I don't really know how much horsepower my first dirtbike should have or what kind would best suit me. I also was wondering where exactly I could ride. By the way I am about 6 foot and 145 lbs. Thanks for any help you can give me.

i am 15 and have out grown my 80 i have been ridin for a long time now and have the experice for a bg bike but i want a bike for technical stuff but i also want to keep up with my friends on the open stuff. my  options are the kx 100, crf150l, crf230f, ttr230, or the klx140l

Hi there, I currently ride sports bikes, but am looking at getting into dirt bikes to improve my skill level, I'm quite a large chap, about 100kgs and I'm wandering what dirt bike to go for. Any advice would be apriciated.