Hi I need to know if it's normal for the front sprocket with the 2 bolts tightened to have a little side to side play in it. I put a new 15t jt sprocket on and the splines on the shaft are fine, but with the 2 bolts tightened over the sprocket washer it still can move a little. Thanks

It's normal. It's a "floating sprocket" design that reduces chain stress and wear.
See http://faq.ninja250.org/wiki/My_front_sprocket_%22wobbles%22 for details.

Thanks! For the info and the link