2021 ST ‘RACING’ MODELS 

25/250/300 ST…

• The exhaust port has been redesigned to provide better low-RPM power and throttle response.

250/300 ST…

• There’s a new cylinder head with increased volume and a different compression ratio.
• The size and shape of the cylinder’s exhaust port have been modified.
• The crankshaft is rebalanced to work in conjunction with the new cylinder head.

• The new swingarm uses a different core that design to be lighter, less rigid, and offer more grip.
• A taller 42-tooth rear sprocket is fitted (the improved engine thermodynamics at low revs have allowed this mod to the primary drive). This reduces the chain effect, which creates better traction.
• Aluminum-colour frame.
• Graphite colour triple clamps and handlebar clamps.
• Black rims with yellow hubs.
• Optimisation and simplification of the wiring harness.
• Lighting system plug and play.
• New 2021 graphics kit (same as the Factory models).