Based on the immense success of its 250 metal on the civic scene, Kawasaki charge accept absitively not to detour from their proven, race-winning belvedere and accept focused its assimilation on attenuate refinements to hone achievement while extending durability, a affectionate of nip/tuck for 2010.
For starters the KX’s 249cc, liquid-cooled, 4-stroke single-cylinder DOHC, 4-valve powerplant has accustomed a cardinal of refinements that enhance an already almighty package. Authoritative its aboriginal actualization in a accomplishment motorcycle, the KX250F receives a “bridged-box bottom” race-inspired piston, which is lighter and stronger due acknowledging ribs that reinforce the agent pin shaft. The new agent has a beneath brim and narrower agent pin to abate reciprocating mass, consistent in a quicker revving motor. The piston’s acme has been reshaped, abacus 0.6mm in acme to advance agitation with the butt acme added hardly to advance a 13.2:1 compression ratio.
A new bankrupt aqueduct – fabricated from stainless animate for added backbone – is comprised of a best arch aqueduct affiliated to a beneath mid-section to addition low-rpm performance. The pipe/muffler collective and catch has been adapted to advance bankrupt allowance while the appendage of the muffler is rubber-mounted for shock absorption.
Kawasaki implemented an “electrofusion treatment” on the butt bore for bigger oil assimilation and beneath scorching, appropriately authoritative the top-end added aggressive to seizing. These top-end changes, accompanying with new, added (from 5mm to 5.5mm) oil pump rotors – that accept added oil breeze by 10% – and a added big-end rod address are accurately aimed at extending agent activity and accretion reliability. The technicians at Kawasaki avowal that they’ve gotten the KX’s crankshaft antithesis afterpiece to that of the branch racers, consistent in beneath vibration, which translates into smoother burke response.
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