DON'T DO IT, unless your a mechanic just spend the extra $$$ and buy a decent one mate, my olds bought one for my niece and it lasted 15minutes of her learning and it broke the clutch pack in three pieces then we fixed that and the frame cracked with her 18kg weight on it, i bought my son a Yamaha TTR50 and have no regretted it AT ALL, its a great little bike and believe it or not safer then a 4 wheeler. I was going to get Callan one but he took one for a ride and rolled it on top of himself on the second corner and that done it for me
just think about it anyway