Page 174 of Kawasaki Motorcycles by Kawasaki USA

Quick-shifting 4-speed transmission takes advantage of the KX450Fs wide engine powerband. Selection of 4-speed transmission (instead of 5-speed) and individual gear ratios were chosen after extensive hours of on-track testing. Gear sets and center cases are compact allowing frame to be narrower at rider s ankles and saves weight compared to a 5-speed design. Ratchet-type shift mechanism provides smooth shifting and positive feel. Shift lever play is minimized with the new shift cam profile. Teflon lined clutch cable provides smooth action and clutch feel. Newly designed, high-capacity Denso radiators deliver superior cooling efficiency. The new radiators are very slim and feature more tightly packed cores and a new fin design for enhanced heat dispersion. Previous KX models KX450F

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