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2004 KTM 300 EXC Motorcycle

KTM 300 EXC

  • Totally new engine based on KTM's new generation 250 2-stroke.
  • 3.5 kg engine weight reduction.
  • Lighter and more compact engine.
  • Boyesen intake reed case.
  • EXC crankshaft has significantly more oscillating mass when compared to the SX engine for perfectly tuned enduro riding.
  • Dual-ring pistons for increased durability.
  • Cylinder head with special enduro combustion chamber.
  • Kokusan 2K3 digital ignition system and ignition cover with more space for the heavier enduro flywheel.
  • Special digi-box with specifically enduro-tuned ignition curve.
  • EXC 5-speed transmission features extra-short 1st gear and a slightly longer 5th gear.
  • Keihin PWK 36 AG carburettor specially tuned for the flat, rideable torque curve of an enduro motor.
  • Exhaust system is a total new design, offering the perfect fit for the new enduro setup, additionally they are equipped with a new shorter silencer, in combination they are responsible for broad usable powerband and a flat enduro-style output curve.
  • Stronger clutch plates offer more reliability.
  • One-piece ignition rotor.
  • Single-tube racing exhaust with new tuned silencer.
  • Additional useful torque.
  • Weight reduction.
  • Only differences between 250 and 300 EXC are the digi box configuration, the exhaust port timing and the piston/cylinder (bore x stroke 250 EXC: 66.4/72 mm, 300 EXC: 72/72 mm).

  • Engine - single cylinder, 2-stroke
  • Displacement (cc) - 293
  • Bore x stroke (mm) - 72 x 72
  • Starter - kick-starter
  • Transmission - 5 gears
  • Carburetor - Keihin PWK 36 AG
  • Control - TVC
  • Lubrication - mixture oil lubrication
  • Transmission lubrication - 0,7 l Motorex Top Speed 15W50
  • Primary drive - 26 : 72
  • Cooling - liquid cooled
  • Clutch - wet multi-disc clutch, operated hydraulically
  • Ignition - Kokusan digital 2K-3
  • Frame - chromium molybdenum
  • Subframe - aluminium
  • Handlebar - tapered Renthal 28 mm
  • Front suspension - WP-USD 48 MA
  • Rear suspension - WP-PDS-shock absorber
  • Suspension travel, front/rear - 300 / 335 mm
  • Front / Rear brakes - disc brakes 260 / 220 mm
  • Front / rear rims - 1.60 x 21"; 2.15 x 18" DID
  • Front / rear tyres - 90/90-21"; 140/80-18"
  • Transmission - 13:42
  • Chain - X-ring chain 5/8 x 1/4"
  • Main silencer - aluminum
  • Steering head angle - 63
  • Wheel caster - 116 mm
  • Wheelbase - 147510 mm
  • Ground clearance (unloaded) - 385 mm
  • Seat height - 925 mm
  • Fuel capacity - approx. 9 litres
  • Weight (ready to race, no fuel) - approx. 105.2 kgs