Kawasaki has launched its 2013 motocross collection, with the new KX250F and KX450F. Both bikes come with updated styling and improved performance. The KX450F comes with a new ‘pneumatic spring fork’ (PSF), the first on a production motocross, which replaces conventional fork springs with pressurised air, Kawasaki claims, to deliver firmer suspension and less resistance. Power is up across the ...
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