2004 KTM 300 EXC Motorcycle
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 Ø 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 - 1475±10 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
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