production runs and pricey
material. ( 2) Thanks to the AMA
production rule, true-to-life works
bikes have been defunct since
1986. Not only that, but the rules
are even stricter in the 250 class.
( 3) There are a bevy of aftermarket companies aligned with Star
Racing that are willing and able
to create the parts that the team
Having said that, Webb’s
YZ250F does come with a few
trick components that are unavailable to the public. The billet
aluminum hubs are from Japan.
They are slightly heavier than
stock but infinitely stronger. The
spokes and spoke nipples are also
factory parts. Star Racing was
mum about the engine internals,
although they admitted that a
few of the parts in the bottom
end are special. Finally, the
plastic gas tank is direct from
Japan. The plastic is thinner, and
it holds an additional 1-1/2 liters
over a standard tank. A layman
wouldn’t recognize the difference
between a standard tank and the
factory part. That’s the creative
beauty of Yamaha’s works parts.
The blue crew wants its race
bikes to look as stock as possible.
Yamaha hopes the consumer will
relate a Star Racing YZ250F to a
production YZ250F sitting on the
showroom floor. It’s a brilliant
WHAT’S THE MOST
UNIQUE PART ON COOPER’S
BIKE? It’s not fair to pick a
single part on a bike so refined
that it is the epitome of YZ250F
perfection. Below is a list of things
that caught our attention.
(1) Front brake. This is the
Frankenstein of front brakes. Star
Racing discovered that mating
different brake parts together
yielded the best performance for
Cooper Webb. While we don’t
want to make Yamaha mad, we
can say that Webb’s front master
cylinder comes off a 2004 model
bike that rhymes with Shmonda.
The caliper is from a 10-year-old
Yamaha. A stock brake line (with
the plastic sheathing cut off) and
standard brake pads, along with
a 270mm Braking Batfly rotor,
complete the package.
( 2) Forks. The Star Racing
team uses Kayaba’s Factory Kit
forks, with Kashima-coated outer
tubes and DLC-coated inners.
Beefy, 32mm anodized cartridge