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KTM 640 LC4 Adventure
|
. |
Make Model |
KTM 640 LC4 Adventure |
Year |
2006 - 07 |
Engine |
Four stroke, single Cylinder. SOHC, 4 Valve per cylinder |
Capacity |
624.6 cc / 38.1 cu in |
Bore x Stroke | 101 x 78 mm |
Compression Ratio | 11.0:1 |
Cooling System | Liquid cooled |
Induction |
Mikuni BST 40 |
Ignition |
Contactless DC-CDI ignition with digital advanced system, KOKUSAN |
Spark Plug |
NGK DPR8 EA-9 |
Battery |
12V 8Ah, maintenance free |
Starting |
Kick & electric |
Max Power |
35.7 kW / 49 hp @ 7500 rpm |
Max Torque |
52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm |
Clutch |
Wet, multiplate |
Transmission |
5 Speed, claw shifted |
Primary Drive Ratio |
30:81 |
Gear Ratios |
1st 14:35 / 2nd 15:24 / 3rd 18:21 / 4th 20:19 / 5th 22:18 |
Final Drive Ratio |
16:40 |
Final Drive |
Chain |
Frame |
Central chrome-moly-steel frame |
Front Suspension |
50 mm WP upside-down forks |
Front Wheel Travel |
300 mm / 11.8 in |
Rear Suspension |
WP monoshock |
Rear Wheel Travel |
320 mm / 12.6 in |
Front Brakes |
2X 300mm sisc |
Rear Brakes |
Single 220mm disc, 1 piston floating caliper |
Front Tyre |
90/90 - 21 54S Enduro 3 |
Rear Tyre |
140/80 - 18 70R Enduro 3 |
Steering Head Angle | 62.5o |
Wheelbase | 1510 mm / 59.4 in |
Ground Clearance | 320 mm / 12.6 in |
Seat Height | 945 mm / 37.2 in |
Dry Weight |
158.0 kg / 348.3 lbs |
Fuel Capacity |
28 Litres / 7.4 US gal / 6.2 Imp gal |
Fuel Reserve |
3.8 Litres / 1.0 US gal / 0.8 Imp gal |
The 640 Adventure presented by KTM retains
only the good features such as versatility, agility, power and gets reed of
the unnecessarily weight and size, resulting in an easy to ride all around
motorcycle with plenty of power coming from the LC4 single-cylinder engine
which proved successful on many KTM models (the Duke, SMC, LC4).
Putting the bike
into first gear
doesn’t involve
any fatigue and
the clutch feel
is firm and
precise. Having
ridden KTM bikes
fitted with the
same engine, I
was now expecting
a quick go
coming from
the
single-cylinder, but
I must say
that throttle
response, although immediate,
was tuned towards
trail riding
so
it is a
bit smoother
and
reassuring.
The engine is
enough powerful
for almost anything
that the off-road
will require:
climbing steep hills,
passing through
rivers, and spreading
dirt. You name
it and the
52 horses at
7000 rpm will
deal with,
problems excluded. It
will also be
the result of
a torquey engine
(55 Nm at
5500 rpm) which
provides all
of
the tractable
power that gets
you out of
trouble and
very
often impresses
your buddies. I
had no problems
taking the 640
Adventure in
deep
mud and then
wash it as
I passed the
river (my feet
were already
wet
and the boots
needed to be
cleaned anyway,
so what better
method?.
Also out on
the trails I
managed to get
the front wheel
off the ground
by suddenly
twisting the throttle
and it was
quite a pleasure
to do this
as the terrain
ahead presented
many step-like bumps.
Impressive pull
saves the day!
But this type
of exploitation
also requires good-performing
suspensions and
the WP front
and rear units
are more than
suitable for
the
job. I did
not manage to
reach the fork’s
bottom end more
than two times
and that happened
while landing
from an ambitious
and optimistic
jump above a
thick log.
The front brake
played a trick
on me (or
I may have
played a trick
on the front
brake) on wet
grass surface,
determining the front
wheel to slip
and the rider
to taste some
muddy grass.
It
is more of
a talent thing
than efficiency
as you have
to calculate
how
much to pull
the lever, taking
in consideration
the fork compression
and the grip
of the surface
you’re on. I
guess that this
is why I’ve
never seen an
off-road rider
with no broken
bones. On normal,
street use,
the
performance Brembo
brakes which
apply their pistons
on two 300mm
discs up front
and a single
220mm disc at
the rear prove
very efficient
and confident-inspiring. I
preferred using
both brakes because
I didn’t wanted
to taste the
asphalt (I reckon
that this ride
report would
have
been published
pretty late). Even
so, it is
steady and
confident under powerful
braking.
I’ve taken the
bike down the
freeway and
up
to 80mph so
I would get
a feel of
those harsh
vibrations that tend
to make customers
avoid it and
I must say
that evolution
has clearly said
its word and
even though
present through the
handlebars and
footpegs, the vibration
levels are
acceptable and easy
to live with.
Would you
preferred the engine’s
grunt to fade
away concomitant
to the rpm
increase? I don’t
think so.
Conclusion
A wonderful mix of power, versatility and fun is what makes the 640 Adventure Traveller’s Edition a true blast each time you ride it. Prepared for the long run on and especially off the road, the bike is a true representation of KTM’s dedication on delivering the best performing and one of the most agile all-around motorcycles on the market today.
Any corrections or more information on these motorcycles will be kindly appreciated. |