Engine Updates:
Evo 2 Stroke
-All the 2-stroke versions - including the 300 SS - have the following new features, designed to give the bikes a more technically polished feel.
-Engines (except the 125 cc) feature a cylinder with a new exhaust port geometry and new timing curves. Both of these developments improve low-rev engine control and stabilize the power delivery, providing exceptional, stock-setting performance.
-Moreover, a new gear selector cam has been designed which was used in the earlier Factory models, and provides more positive shifting.
-Another Factory model feature is the new CDI control unit, now with even better performance and optimized mapping for the new cylinder.

Evo 4 Stroke
-The 300 4T (4-stroke) engine has also been upgraded. One of the most important new features is a new throttle with a redesigned internal ramp that gives better low-rev power control. Like the 2-strokes, the 4-stroke inherits the new CDI control unit with new, dedicated mapping.

Chassis Updates:
Much of the attention was directed at the chassis set-up, with a series of new features on both the 2-stroke and 4-stroke models:
-New shock absorber port geometry: now higher and more progressive;
-New shock absorber piston: increased suspension sensitivity and progression. Together with the modified plug geometry, the new piston generates decidedly more grip, making it more forgiving in the event of rider error;
-New pump on mechanical side of fork: ensures more progressive impact absorption;
-New fork oil: improves stability at high temperatures, maximizing smoothness;
-Renewed chain tensioner: adjustment range now wider while making adjustments easier;
-Rear brake caliper with brake pad anti-vibration system: maximizes precision and significantly reducing noise. 
-New graphics and colors