Kawasaki Brute Force 650 quad

When I was given the chance to test three Kawasaki bikes, a 650cc and 300cc from its Brute Force range of quads, and a 250 stockman two-wheeler, it was an offer that was too good to turn down.

Mike Wilkins from Kawasaki managed to get the three bikes to our
location, where he had not only found a farm that did not mind us
tearing up a bit of grass for the day but he had also rounded up a
few local farmers, who turned out to be a great group of guys, all
with a lot of experience about bikes on their properties. They were
as keen as me to see how these Kawasakis shaped up.

So, this month and over the next couple, I’ll be bringing you
the reports of my three tests, as well as the opinions of three
guys who spend hundreds of hours each year riding them on their
farms.

First up this month is the Kawasaki Brute Force 650 Quad bike
with everything that you would expect to find on a larger sized
bike and a few extras, but Kawasaki has priced and aimed it at the
500cc market, so you get impressive power, handling and performance
for a very sharp price.

The test took place on a dairy farm that is being run by Robert
Brookes, who was also there and pretty keen to test the Kawasaki
650 to its full limits. With a decent race, a paddock with some
steeper sidelings, a good patch of mud and plenty of time, all of
us got a chance to see what it could do.

Engine

The impressive power of this quad comes from a liquid-cooled
633cc SOHC, V-twin engine – what does that mean, I hear you ask? A
single overhead cam (SOHC) and the V-twin means the two cylinders
in the engine are in a V configuration, with 90 degrees of split
between them. This gives the impressive torque, excellent balance,
low engine vibration and as the guys noted on the day that grunty
V-twin sound.

Kawasaki has chosen to stay away from fuel injection, sticking
with their tried-and-tested carburettors claiming that they cause
very few problems and that sometimes the fuel stored on farms isn’t
as clean as fuel injectors require. The carburettors draw in clean
air though a filter box and a snorkel head up under the handle bars
of the bike out of the way of mud, dust and water.

Transmission

The power developed by the engine is run through the Kawasaki
Automatic Powerdrive System which is a continuously variable
transmission with a Hi, Lo, neutral and reverse that are selected
with a lever on the right hand side of the bike under the handle
bars.

This transmission set up from Kawasaki gives you zero to ‘bloody
hell that’s quick’ in hi, and the power required for pulling heavy
loads, like palm kernel trailers, through mud and up hills in low.
Engine braking for the quad is electronically controlled. This
monitors the speed of the bike in relation to acceleration: when
the speed is increasing and the acceleration decreasing, the
tension on the drive belt increases, using the compression of the
engine to slow the bike down. This works exceptionally well on
steep hills in low gear and also on the flat and on moderate slopes
in hi, but not as well on the steeper ground – but then that’s what
low gear is for.

Chassis

The bike sits on a sturdy double-cradle frame, built out
high-tensile tube steel. At the front the of the chassis dual A
arms mount the front wheels and use adjustable independent
MacPherson struts to give a smooth ride and good control of the
bike. Piston disc brakes are fitted out near the wheels on each
side with the drive coming from a differential in the centre out to
the wheels through a booted drive shaft.

At the rear of the bike there is a solid axel that is mounted to
the frame by a rigid light weight aluminium swing arm that uses a
single adjustable shock for the rear suspension. Housed in the
swing arm is the drive shaft for the rear axle and also the
internal rear brakes which are multi disc brakes sealed in an oil
bath. Having the brakes and drive shaft sealed in the swing arm is
a great idea from Kawasaki to keep as much of the mechanics out of
the mud and crap that bikes need to deal with daily on farms.

Controls and layout

The 18-litre fuel tank with an inbuilt pump is located towards
the rear of the bike under the seat, which gives a much lower
centre of gravity and more weight over the rear wheels. With the
tank at the rear this leaves more room up front for the air-filter
box and the large radiator. Cleverly the filler and level bottle
for the radiator is located down below the seat on the left hand
side of the bike, this is much more sensible than other bikes where
once anything is mounted on the front carrier the filler cap for
the radiator becomes very hard to access.

Up on the handle bars, the controls follow a layout much the
same as most quad bikes these days, a throttle, a brake and the
push button four wheel drive on the right hand side with the gear
selector and the ignition key below the handle bars. In the centre
there is a digital display that includes a speedometer, odometer,
trip metre, clock, fuel gauge and hour meter. Along with lights for
neutral, reverse, 2WD/4WD and an oil level warning, over on the
left handle bar is the light, start, engine kill, choke, reverse
over ride and a brake lever with a park lock. A handy 12-volt power
socket is located under the handle bars on the left-hand side.

In front of the brake lever is a variable front differential
lock. This, I believe, is a unique feature to Kawasaki. It is
basically a lever similar to a brake lever that you squeeze. This
lever engages the front diff-lock as much or as little as the lever
is squeezed, allowing you to engage the front as much or as little
as required while still allowing the bike to be steered easily.
This would be very helpful when towing loads though muddy areas
where diff-lock is required, as well as being able to steer the
bike.

Manufacturer says

Kawasaki thinks of this machine as supersized 500cc quad bike
with many more features. The powerful V-twin gives it plenty of
low-down torque for towing; the multi-disc wet brakes and
electronically-controlled engine brake provide plenty of stopping
control on hills and when towing. The quad has been built tough
after years of experience providing bikes for harsh farm
conditions.

Mike Wilkins from Kawasaki believes that the Brute Force 650 is
well suited to farms that require a larger quad for carrying and
towing heavy loads. The brand have priced the bike to target the
500cc market.

Verdict

Everyone at the test day certainly didn’t hold back on the quad
and the thing that they all commented on after riding the bike was
how much power it had. The bike has no problems on the hills, with
good traction and stability due to the low-slung fuel tank. It is a
well laid-out bike and is very comfortable to ride. The only thing
I would like to see changed is a park lock on the transmission, a
feature that is common on a lot of other bikes.

Overall, this bike has a lot going for it, especially the
exceptional price. For those looking at something in the 500cc
market, the Kawasaki Brute Force 650 is definitely worth a good
look.

Positive

Exceptional price, due to the Bike being marketed at the 500cc
bike market
The V-twin 633cc engine is very responsive and full of
power
The Variable front differential lock control
The radiator level and filler bottle that is easily accessible
on the side of the bike

Negative