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2005 KX 250F

There are some major/minor changes from the 2004 model.

Engine Improvements:

• Improved low and mid-range response comes care of a straighter exhaust port and extended centre ribs in the intake and exhaust ports.
• Revised ignition timing improves top-end and over-rev performance.
• Rev-limiter changed to spark drop out control for smooth power drop-off and excellent over-rev characteristics.
• Clutch has a fewer number (reduced from 48 to 36) of new friction elements for more direct action/feel.
• Left and right radiators are 40 mm longer. The improved cooling efficiency yields more stable performance.

Chassis Improvements:

• Head pipe wall thickness increased from 2.3 to 3.2 mm for improved handling.
• Front fork benefits from new, low-friction seals for smoother action throughout the stroke range.
• On-the-fly clutch adjuster added to clutch lever perch.

Other Improvements:

• Water pump cover and oil filter cap are now separate for improved maintenance.
• New footpegs are wider and offer better grip. Shorter transverse length means greater cornering clearance.
• New front brake lever has better feel.
• New seat cover uses a high-grip top and smooth sides for good grip when sitting and high mobility when riding on the pegs. More durable urethane foam improves comfort and wear.
• Wider handlebar mounts (increased from 90 to 98 mm) help prevent handlebar bending.
• Fork mounting bolt locations changed on the top triple clamp for easier maintenance and stronger mounting (front/back > left/right).
• Clutch cable outer liner changed from polyethylene to Teflon for reduced friction.
• Stainless throttle cable wire with a greater number of thinner strands delivers superb, low-friction throttle operation.
• Low-friction throttle barrel also reduces throttle operating friction.
• New front brake pad material offers better feel and performance.
• Lighter fork and rear shock mounting bolts contribute toreduced weight.
• Chain guide roller now uses two bearings for greater durability.
• A number of engine parts were revised for improved reliability/durability. These include: shotpeening for 3 rd - 4 th input gear, a reinforced air cleaner box, new clutch spring material, new muffler packing and construction, redesigned perforated pipe and a more rigid water pump cover.

Optional engine parts include: 40 mm shorter (lighter) radiators for shorter motos, ignition rotors with different inertial weights, a manual decompression lever and a smaller 12T front sprocket. Optional chassis parts are unchanged.

KX 250F SPECIFICATIONS