Hoffmann
They brake deeper into corners and are on the power earlier. Trust me, you don't want to hit a 2-stroke powerband when your bike is at an angle.
Unless you like air time...
Saying that, its still more pertinent to the old 500 2-strokes than the 250s, and 125 is a completely different deal again, whereing weighing 100lbs is the biggest benefit going.
a 500cc 2 stroke is COMPLETELY different from a 250 or 125.. sure the powerbands are narrow, but the 250 and 125 dont have monster power. The 500cc bikes need to 'square' corners off, because you *really* cant use that kind of power leaned over. A 250 and 125 dont have enough power to cut corners like that. If you brake hard and slow down too much, you wont have enough juice to get it going up to pace again.
125 and 250 2 stroke racing is all about keeping your speed. Think of the brake as a speed adjustment, not an on-off switch. The 125s and 250s have a HUGE advantage when it comes to cornering clearance and corner speed. This needs to be exploited. Trail brake late and deep into corners and wick it up asap (while still leaned over). You cant afford to roll the throttle off for one fraction of a second. Your going to have to be precice and deliberate with evry braking, throttle and turning input.
The 250s have equivilant power to a 600cc supersport (actually a bit less), and accelleration is quite good, but top speed suffers (only horsepower and aerodynamics determines top speed, not wieght). The powerband may be peaky, but the bikes are so light, and the power isnt so overwhelming, you can use all of it in a corner, only suffering minor slides now and then.
You can get away with ALOT more on a light bike like this, than a heavy bike.
So, be precice, deliberate with your control inputes. Trail brake LATE and deep into the corner, keep corner speed as high as possible, and get on the gas as soon as possible. Roll it on smoothly, lean back a little bit when your cranked over to ensure the rear tire hooks up. The keep it pinned all the way to the next corner.
I have had sucsess using just the front brake. It allows you to keep a much tighter line when entering a corner than using both brakes. This means you can brake deeper into the corner, which means you can keep the throttle open that much longer on the previous straight. The way you release the brake is important to, if you just snap it open all at once, the bike will run wide, if you smoothly release it as you are about to apex, the bike will *suck* to the inside of the turn.
Good luck.