The 2007 MY RM85L is Suzuki's solution for riders who outgrow their small-displacement bikes, but do so only in terms of dimensions. The L suffix introduces larger wheels for a completely changed stance, better ground clearance and more compliance with taller riders. On the tech side, this is about all that's changed form the base version of the RM85, but it looks like enough.
This way, taller kids will not be forced to take the step to larger-displacement bikes, and will be able to keep within the limits of this class.