Dean runs ARC’s customizable levers. They can have the
leverage ratio changed in a few seconds.
Red is rebound, blue is high-speed compression and silver is
low-speed compression on the Kayaba Factory Kit shock.
Technical Touch will sell these very special Kayaba Factory
Kit coil spring forks to anyone—with $4500.
ONCE WE HAD THE ENGINE, WE CALLED DEAN
TO TRACK DOWN HIS PLASTIC, GRAPHICS, SEAT,
WHEELS, BRAKES, HOSES, TRIPLE CLAMPS.
LEVERS AND MISCELLANEOUS PARTS. DEAN
SAID THAT MOST OF THE PARTS ON HIS YZ450F
HAD BEEN PARTED-OUT, AND HE DIDN’T HAVE
ANYTHING THAT WASN’T WORN OUT OR USED.
No problem. We started making calls. Our first call was to
Split Designs to get Dean’s complete graphics package. At
first they said that they were busy making a management
change and couldn’t help us. In frustration, we ordered
stock Yamaha plastic as an easy bail-out and made plans
to get Decal Works to build us similar—but not exact—Dean
Wilson cosmetics. Then, Split called back and said they
would make us a one-off set. Great, except it didn’t fit the
brand-new blue YZ450F plastic that we ordered in haste.
No problem, we called Cycra and had them send us the
correct plastic, and, while we were at it, we sent out for the
MotoSeat seat cover, Works Connection holeshot device,
VP Racing fuel, DT-1 air filters, Maxima engine oil, CV4
hoses, ARC levers, Galfer over-size rotors, TM Designworks
chain guide, LightSpeed carbon fiber brake rotor guards
and chain guide, and miscellaneous added parts.
WHAT ABOUT DEAN’S KAYABA WORKS
SUSPENSION? AT FIRST WE THOUGHT THAT
SINCE IT WAS JUST A REPLICA OF DEAN’S
YZ450F, WE WOULD HAVE TO MAKE SOME
COMPROMISES IF WE COULDN’T SWING THE
ACTUAL PARTS. We had Bones Bacon re-valve our
stock Kayaba SSS shock and forks and even thought about
putting Showa A-kit stuff on the bike. But, in a stroke of
genius, we called Technical Touch. They handle Kayaba’s
aftermarket suspension business. And, since we had no
shortage of experience with Kayaba’s A-kit-style $4500
Factory Kit spring fork, we asked them if they would lend
us their best shock and fork combination for our Yamaha
YZ450F. “No problem,” they said. “Swing by and pick it up.
We still have the set we gave you for your earlier YZ-F projects sitting here.” Quick like a bunny, we had works suspension on our Dean Wilson replica. Plus, they threw in the
$900 Xtrig ROCS triple clamps to hold the forks in place.
We added the ARC levers and Pro Taper Fuzion bars.
THE LAST PIECES OF THE PUZZLE WERE THE
WHEELS AND BRAKES. Dubya USA offered to give us
a set of wheels that would replicate what Dean ran, including the Kite hubs. We then added the Galfer rotors to up
the stopping power. Now we could leap tall buildings in a
single bound, without it being our last bound.
WHAT STARTED AS AN OFFER TO GIVE US
DEAN’S ENGINE ENDED UP WITH US GETTING
CLOSE TO ONE OF ONLY THREE YAMAHAS
TO SCORE SIGNIFICANT POINTS IN THE AMA
SUPERCROSS SERIES. But, the question remained as to
how well it would work. We spent some test time working
out the adjustments and settings with our Pro test riders
before handing the bike over to a wide variety of Vet,
Intermediate and Novice test riders.
Here are the particulars:
Power. It was fast, but it wasn’t hard to ride. The
powerband was tuned for more low-to-mid power, which
is where a Supercross engine needs to be. What surprised
us most was that it was so easy to ride that we could
use the abundant power without fear. It was much more
linear than the stock engine, not as abrupt and devoid of
jerkiness. It could be rushed off the bottom, if need be, but
it never scared the test riders. The power was broad, but
there was no need to rev it. On a Supercross track, there
aren’t many places to go for broke at high rpm; the majority of the time the power is kept in the low-to-mid sweet
spot to get up and over big jumps with very little run.