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KTM 450 EXC
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Make Model |
KTM 450 EXC-R |
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Year |
2011-12 |
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Engine |
Liquid Cooled, four stroke, single Cylinder. SOHC, 4 Valve
per cylinder, |
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Capacity |
449.3 |
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Bore x Stroke |
95 x 63.4 mm |
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Compression Ratio |
11.9 : 1 |
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Induction |
Keihin MX FCR 39 |
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Ignition /
Starting |
Kokusan digital / |
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Max Power |
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Max Torque |
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Transmission /
Drive |
6 Speed / chain |
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Frame |
Central double-cradle-type 25CrMo4 |
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Front Suspension |
WP-USD Ø 48 mm, 300mm wheel travel. |
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Rear Suspension |
WP PDS-Federbein, 335mm wheel travel |
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Front Brakes |
Single 260mm disc |
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Rear Brakes |
Single 220mm disc |
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Front Tyre |
90/90 -21 |
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Rear Tyre |
120/90 -18 |
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Seat Height |
925 mm |
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Wet-Weight |
113.9 kg |
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Fuel Capacity |
9 Litres |
The 450 EXC can justifiably
claim to be the most widely ridden bike in enduro sport and a serial winner
in the E2 World Championship. The top dog has been revamped and slimmed down
in practically every aspect - from the frame to the electronic injection and
the engine management system to the material selection. Above all, the new
chassis and redesigned OHC engine widen the 450 EXC's lead over the
competition by a further bike length. Extremely light, supremely agile and
endless power - that's what winners look like.
With the 450 EXC there isn’t a
terrain or terra firma it can’t tackle. When the dirt ends, there’s no better
solution than a street-legal EXC. Trails connected by pavement, no problem.
Trails filled with different passages, rocks and slippery logs and roots, no
problem. Street legal has never been so versatile and fun.
The 450 EXC's new bodywork with
the very slim seat and spoiler lines, plus excellent contact points,
perfects the bike's ergonomics, making handling even simpler and more
precise. The longer rear fender protects the rider even more effectively
from swirled up stones.
NOW WITH EVEN MORE PERFORMANCE
NEW ENGINE
With the 450 EXC's newly developed
engine, KTM engineers have created a new dimension: The power unit has been
redesigned from scratch and is now more compact, lighter and more powerful than
before. Reduced reciprocating weight and a balancer shaft minimise vibration.
NEW EFI/EMS
The newly developed Keihin engine
management system with electronic fuel injection ensures spontaneous
responsiveness from the engine. Various engine characteristics can be activated
with an optional map select switch.
NEW OIL CIRCUIT
The 450 EXC's new engine is equipped
with a common oil circuit for engine and transmission, and two oil pumps. A
pressure pump lubricates the engine, while a suction pump draws oil from the
crankcase, using it to lubricate the transmission and the clutch. At the same
time and in conjunction with a steel diaphragm, negative pressure arises in the
casing, which boosts the engine power.
NEW BALANCER SHAFT
The 450 EXC's new, laterally
integrated balancer shaft not only eliminates vibration, but also serves as the
drive for the water pump. This intelligent multi-functionality contributes to
the compactness and low weight of the 450 EXC's new engine.
NEW ENGINE CASE
The 450 EXC's new engine case weighs
almost 2 kg (4 lb.) less than its predecessor, although it offers better
resistance to damage due to stone impact or falls. This has been achieved by
using a high-strength, elastic aluminium alloy and changing from sand-casting to
die-casting.
NEW CRANKSHAFT
When designing the new crankshaft on
the 450 EXC, KTM engineers focussed on reducing the reciprocating weight. Thanks
to the new, lighter connecting rod and the new, lighter piston, they managed to
achieve minimum vibration, while maximising engine-speed strength.
NEW CYLINDER AND PISTON
The 450 EXC's cylinder has been
further developed especially for the new engine configuration. The new, 15 %
lighter forged piston minimises reciprocating weight and optimises durability at
high engine speeds. New, nitrided piston rings ensure highest levels of
resistance to wear.
NEW CYLINDER HEAD
All ports and the combustion chamber
have been redesigned in the OHC cylinder head of the 450 EXC's new engine. The
new camshaft actuates four valves via lightweight rocker arms, with high-quality
titanium valves being used on the intake side.
NEW CLUTCH
The 450 EXC's newly developed
clutch, with a robust steel cage and transmission-friendly back-damping, makes
use of a spring washer for the first time instead of the customary conical
springs, hence substantially reducing the operating force. The hydraulic
actuation mechanism from Brembo® facilitates sensitive modulation of the clutch.
NEW SILENCER
The 450 EXC's new, improved silencer
not only offers greater volume and a new design, it also reduces noise levels to
the stricter standards of the future.
NOW WITH AN EVEN MORE SUPERIOR
CHASSIS
NEW FRAME
The completely revamped frame made
from high-quality chrome-molybdenum steel is characterised by even greater
lateral stiffness. Furthermore, it is even better at absorbing jolts introduced
by the suspension system, whereby the simple handling and comfort of the 450 EXC
have been further optimised.
NEW SWINGARM, NEW PDS, NEW SETTING
The 450 EXC's new, lighter, cast
aluminium swingarm accommodates the shock absorber more centrally, in order to
load the swing arms more evenly. The new, 7 mm (0.28 in) longer PDS shock
absorber with adjustable rebound and high/low-speed compression damping, and a
new setting is installed more flatly, so providing even more progression.
TELESCOPIC FORK, NEW SETTING
The 450 EXC is equipped with the
latest WP upside-down fork with wider adjustment ranges and a new setting. The
sensitive responsiveness and outstanding damping of the open-cartridge fork with
48 mm (1.89 in) outer tubes are a perfect complement for the 450 EXC's simple
handling and precision.
NEW WHEELS
Practically unbeatable in terms of
weight and stability, the new wheels have CNC-machined hubs, Excel rims,
zinc/nickel-coated spokes and aluminium nipples. They reduce the unsprung and
gyroscopic masses, hence bolstering the simple handling of the 450 EXC.
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