I'm a "better brakes" guy and, to be honest, I do NOT like the 16" wheels. What I want is to upgrade to ZX6R wheels and brakes on all corners. I know that the rear may be pretty difficult to facillitate but I'm willing to do the work if it's possible. I'm thinking that either the swingarm it's self needs to be widened or that ZXR swinger will need to be adapted somehow. The front wheel I think will need to bring over an entire ZXR front end so that I have the front suspension, brakes, and wide enough forks to accomidate the wheels.
However, in the mean time, I'm going to be working on adapting my Suzuki Bandit 400 wheels and brakes to the Ninja. If I'm not mistaken the Ninja 250 has a single 276mm rotor with a 4-pot caliper and the Bandit has a 320mm rotor with a 2-pot caliper on the front. I'm going to slap the Bandit wheel and rotor on the 250 with her stock 4-pot caliper. This will give the bike a little better and smoother bite and then I'll have the benefit of a 120/70~17 BT090 on the front. I'll have to machine an adapting bracket to get it to fit right, but that won't be a problem. Then the Ninja's rear is given a 193mm rotor and a single piston caliper as opposed to the Bandit's 250mm/2-pot caliper...so there I'm going to pull over boh the wheel and caliper and have the superior rear brake setup and a 160/70~17 BT090.
I'll let you guys know how all works out.