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
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