WHATS THE SAME?
Yamaha’s five-valve, 660cc four-stroke motor is still one the most powerful and torquey engines on the planet. Combined with the fully lockable
front differential and limited-slip front
wheel drive, the motor hooks up and
hauls in both the work and play environments.
A low-maintenance front shaft drive
uses an electronic servo-activated
2WD/4WD system to make changes
between the ranges as easy as push-
ing a button. Since the single cylinder
engine is canted at a 45-degree angle,
the Grizz has ample ground clearance
( 11. 8 inches) and a low seat height
( 34. 6 inches).
Vibration on the big single is kept to
a minimum with a gear-driven crankshaft balancer and rubber damper
engine mounts. To complement the
pushbutton starter, a decompression
aided recoil pull starter is also standard equipment.
The fully automatic transmission
has both high/low ranges as well as
reverse, and a “park” feature. The
Ultramatic belt-drive transmission also
comes with all wheel engine braking
for increased downhill braking ability.
Engine and transmission cases
have been sealed against water leak-
age to help prevent belt slippage
when the machine is immersed. But
just in case you do get the belt wet,
there is also an easy to use side cover
drain that you can access to let the liq-
To actually see how the newest
Grizzly performs in the rugged 4x4 theater of operations, we took our unit out
on the woods, trails and ranch lands.
The Griz boasts a claimed dry
weight of 600 pounds, just like its
Honda Rubicon 650 rival. Since dry
weights do not reflect what a machine
would weigh in the field, with a full
complement of fuel, fluids and oils, we
took a look at the official Dirt Wheels
scale to see what the actual riding
Our ready to ride Griz came in at
625 pounds with a little less than half a
tank of gas (the Griz holds a huge 5. 3
We also wanted to see what sort of
pull the recoil starter needed to get this
mighty single up and running. After
only two hefty tugs on the auto decompression hand recoil starter, the motor
purred to life.
Once we had the motor up to operating temperature, we engaged the
Griz’s easy to use “On Command” system and slipped it into 4WD mode and
high range. The left-side mounted
There’s plenty of power on tap
with the Griz’s monster 660
engine should you want to
pitch this sporty 4x4 into a four
wheel drift. Hoo-ya!
Yamaha offers the Grizzly 660 in two different camouflage options for hunters and