KTM 450 EXC-F 2018:Tame any terrain
You don’t just become the bestseller. You have to earn it. With mud, sweat and gears. The power-to-weight ratio of its compact DOHC engine is spot on for any terrain and situation. It will answer the call of the wild with precise handling and tough suspension. No matter how mud-caked your face is, that smile will shine through. When you find the end of the trail, you will know what we’re talking about.
Small in dimensions, sky-high on output. The KTM 450 EXC-F’s
fuel-injected SOHC powers the most compact and lightest 450
on the market, while delivering groundbreaking performance
over the entire rev range. Class-leading and cutting-edge: just
the way we like it. And it’s Euro IV homologated, so it’s green,
while they are green with envy.
A single overhead camshaft controls intake and exhaust
through optimized ports, while a cutting-edge
combustion chamber and water jacket create mind-blowing
power while managing heat. The engine’s four valves rely
on extremely rigid rocker arms. Double lateral brackets fix
the engine to the frame and reduce vibrations.
The KTM 450 EXC-F is fitted with a unique E-starter as
standard, which is a clear advantage when it comes to
crunch time in the heat of battle. A strong starter motor
and a reliable lithium ion battery will fire up your 450
time and time again at the push of a button. To reduce
weight to the minimum, there is no kick-starter system.
You won’t miss it. If by any chance you do, just retrofit
a KTM PowerParts replacement kit to get your kicks.
The KTM 450 EXC-F’s crankshaft utilizes a short connecting rod,
which makes for an overall compact and lightweight engine
with a snappy power delivery. A plain big (bottom) end
bearing with two force-fitted bearing shells runs directly on
the crank pin. The necessary oil feed for this bearing is
ensured by the engine’s pressurized lubrication. This design
is a decisive benefit in terms of the crankshaft service interval,
which can be lengthened due to the plain bearing. So just
pin it, all day long.
ENGINE CASES AND COVERS
The design of the die-cast crankcases allows for minimal
weight and a very centralized shaft configuration. This makes
the engine short and compact, while contributing to an
efficient centralization of masses. The engine covers also
feature a solid surface structure, which reduces the wear
caused by the rider’s boots. This way, your
EXC-F will keep looking better longer.
The reliable 6-speed transmission features a special surface
treatment on the 2nd, 3rd and 4th gears for solid reliability.
The advanced ´No Dirt´ gear shift lever design prevents dirt
from jamming the joint of the lever and guarantees precise
shifting even in the muddiest conditions. All 4-stroke EXC-F
engines are fitted with a gear position sensor for tailored
engine mapping for each gear. In MY18, the transmission shaft
gets a new C4 bearing that has a bigger overlap in the case.
This means reliability even under extremely hard conditions.
Think GP-level riding. In knee-deep sand. And a new, stronger
shifting star made of MIM steel (metal injected molding)
improves reliability even further.
ENGINE MANAGEMENT SYSTEM
The state-of-the-art Keihin engine management system
with electronic fuel injection features a 42mm throttle body.
Thanks to its unique injector position, the engine’s response
gives a whole new meaning to the word ‘instantaneous’. Separate
circuits for cold-starting and idle make on-site adjustments easy.
Push the throttle back when the engine is warmed
up and the cold start mode disengages.
To balance the mass forces, the KTM 450 EXC-F engine uses
a multifunctional, side-mounted balancer shaft, which at
the same time drives the water pump. It has been
balanced to perfection, keeping vibration levels to a minimum,
even while gunning it to the maximum.
The KTM 450 EXC-F employs the KTM-developed DDS
clutch (damped diaphragm steel) with a wear-free steel
basket and extremely heat resistant clutch plates and new,
nitrated steel liners. This clever design employs a diaphragm
spring instead of the usual coil springs, making for considerably
easier clutch action. A diaphragm spring also leaves sufficient
space for a damping system to be integrated into the clutch hub.
The goal is traction, but durability is as well. Light operation
and telepathic amounts of control are standard with
this hydraulic Brembo actuated clutch.
Cylinder and piston
Inside the cylinder, with a bore of 95mm, thumps a forged
box-type piston with an ultra-light piston pin. Its crown
geometry is adapted perfectly to the combustion chamber,
where its rigid structure and low weight shine. Thanks
to low oscillating masses, the engine is as smooth
as it’s powerful.
The high-tech, lightweight chrome-moly steel frame has a knack
for easy handling, outlandish rideability, precise cornering
and excellent stability. You can also count on high torsional
rigidity and low longitudinal stiffness. This results in better
absorption of the energy created from the front and rear
suspension sucking up jumps and bumps. In short: more comfort
and less rider fatigue. Laterally attached, lightweight engine
head stays (the connection between cylinder head and frame)
contribute to a reduced vibration level. Two threaded inserts in the
lower cradle tubes allow for safe fixation of an optional
skid plate. The engineers could pull off all that, while making
their frame a big fat kilogram lighter than that of the lightest competitor
on the market. In addition, it is easier to maintain, easier to work
on and supplies more space for the tank and other components.
The bike also features an extra-light subframe made of stable
aluminum profiles, which tiptoes the scales at less than 900g.
Sophisticated ´No Dirt´ footpegs prevent jamming up of the pegs,
even when digging in deep ruts. The pegs on the EXC models are
6mm higher than the ones used on SX models, which benefits
ground clearance. But you can swap them at will.
This state-of-the-art swingarm allows for an optimized mounting
position of the PDS shock absorber, providing more
progressive action. Furthermore, the cast aluminum design
guarantees lower weight and a perfect flex behavior. The
single-component casting process also eliminates any
inconsistencies and weak points.
You can’t brake any harder, better, faster or stronger. High-tech
Brembo calipers are combined with lightweight Wave brake
discs. The steel-flex front brake hose has efficient protection
and there’s an integrated channel for the speedometer
cable. First you outrun them, then you outbrake them.
The WP Xplor 48 upside-down fork is a split fork developed
by WP in close collaboration with KTM. It is fitted with a spring
on both sides but features separated functions for each
fork leg: compression damping is fitted on the left side,
while rebound is on the right. The forks can easily be adjusted
for compression and rebound with the twist of a dial on the
top of the forks. New outer fork tubes and a reworked setting
make for more sensitivity, improved damping behavior and
a reduced weight. In addition, a sealed hydro-stop guarantees
excellent resistance to bottoming-out. Due to high-quality
materials and a state-of-the-art production process, the
new WP Xplor 48 fork – with approx. 300mm of travel – has
outstanding response and damping characteristics. A comfortable
preload adjuster can be retrofitted and allows for a simple
spring preload setting in three steps without tools
(standard, +3mm, +6mm).
The PDS is kind of a KTM trademark where the shock absorber
is directly connected to the upper side of the swingarm. This
setup boasts the best possible mounting geometry and
provides amazingly progressive damping. The shock absorber
is mounted close to the centerline, which means nearly
symmetrical loads for the swingarm and frame and more
space for the exhaust system. A second piston works
together with a closed cup (instead of a needle) towards
the end of the stroke and is supported by a progressive
shock spring for exceptional bottoming resistance. Various
machined and anodized components and a distinctive WP
color trim make this a valuable, high-end product compared
to the less refined shock absorbers of the competition.
The EXC-Fs are fitted with forged triple clamps with an offset
of 22mm, ensuring a solid grip of the fork and precise
handling. The handlebar is adjustable forwards and backwards
over 4 positions, so the EXC-F will fit you like your favorite gloves.
KTM engineers know how to handle handlebars. This tapered unit,
made of high-strength aluminum by NEKEN, features a throttle assembly
with a robust aluminum body and easy free-play adjustment.
An ODI volcanized grip sits on the right, while on the left side
of the bar a comfortable ODI lock-on grip requires no glue or
wire to secure it. You can retrofit two interchangeable throttle cams,
for different response characteristics to suit your specific needs.
With an optional map select switch you can select an alternative
power characteristic and activate the unique traction control,
a major benefit under wet riding conditions.
KTM R&D, KISKA Design and the factory racers had their
say in shaping the plastics with one goal: complete harmony
between rider and bike. Perfect ergonomics and contact points
provide maximum comfort in movement on the EXC-F. The I-beam
structures of the front and rear fenders guarantee maximum
stability and a low weight thanks to well thought-out construction
and mounting. They also stay cleaner for longer. Clever
brake hose routing on the front number plate prevents
wear and tear.
New graphics convey the READY TO RACE character
of the 2018 KTM EXC-F model line.
Air filter box
The air filter box design offers maximum protection of the air filter
against soiling, while ensuring maximum airflow in a quiet way.
The large Twin Air filter is mounted in a stiff cage, which
at the same time holds the system in place. This design is so
simple; you can pop a fresh one in with a face full of
mud – without tools and in seconds.
The lightweight polyethylene tank has a capacity of 8.5 liters. You
will always be able to see how much fuel remains at a glance,
thanks to the see-through plastic. By pushing the orange release
button in the center of the fuel tank cap, the bayonet mechanism
makes refueling quick and easy. It is fitted with an integrated
fuel pump system and a fuel level sensor. Additionally, the fuel
line features a 90° connector to the tank for better
protection against damage.
Noise limits are a real challenge for every manufacturer. Therefore,
KTM has put a lot of effort into the development of its
exhaust systems. All 4-strokes are fitted with a short high-end
aluminum muffler, mounted as close to the engine as possible.
This means more power, extra mass centralization and better
rideability. An advanced internal design reduces the noise
sufficiently to sit safely below the noise limit, while still providing
the engine response and performance that is expected from a KTM.
The EXC-F’s wheels feature lightweight, CNC machined hubs and
high-end Giant rims guaranteeing maximum stability at minimum
weight. The wheels are fitted with MAXXIS tires – perfect for
surefooted performance off-road and stability on-road.
Battery & Wiring harness
A strong lithium ion battery breathes life into the engine and
contributes to low vehicle weight. The lightweight battery
and wiring harness are centralized in a compartment above
the air filter box, allowing the mechanic to remove the
subframe without getting in conflict with the electronics.
A happy mechanic is a good mechanic.
KTM’s proven cooling system routes the coolant from the
cylinder head through the frame triangle, directly to
aluminum radiators made by WP. Thanks to flow optimized
internal circulation and CFD-calculated ventilation, the system
is superbly efficient. In addition, new radiator protections
improve heat dissipation. Especially in the mud. They are
also integrated into the front part of the shrouds
to protect the radiators in a crash.
|Design||1-cylinder, 4-stroke engine|
|Starting aid||Electric starter|
|CO2 emissions||82.3 g/km|
|Clutch||Wet, DDS multi-disc clutch, Brembo hydraulics|
|Fuel consumption||3.55 l/100 km|
|Frame design||Chrome-molybdenum steel central-tube frame|
|Rear suspension||WP Xplor PDS shock absorber|
|Suspension travel Front||300 mm|
|Suspension travel Rear||310 mm|
|Rear brake||Disc brakes|
|Brake discs - diameter Front||260 mm|
|Brake discs - diameter Rear||220 mm|
|Steering head angle||63.5°|
|Ground clearance, unloaded||355 mm|
|Seat height, unloaded||960 mm|
|Tank capacity (approx.)||8,5 l|
|Weight READY TO RACE (without fuel)||106 kg|