I rode mine in the trails ALL summer
At first, It was a little strange
Your Brakes are your friend. and dont be upset if the bike feels unpredictable at times
the powerband can be tricky. but you will get used to it after enough practice
Once you are comfortable, you'll love the 125
Just remember: You only go as fast as you want to...
Start slow, work your way up. You will wipe out time to time. but jus get back up
Take it gradually. and have fun!
Good luck