VOL. 51 ISSUE 45 NOVEMBER 11, 2014 P91
BARE MINIMUMS
"The YZ250F is a very good bike
from scratch; you're going to
spend more money getting, say,
the Kawasaki KX250F race ready
than you would the Yamaha,"
said one of Pro Circuit's techni-
cians who worked on our bike.
"It's a good and reliable bike. It
has a great motor and doesn't
need much, really. But everyone
else is going to be modifying their
bikes, so there are few relatively
easy, safe and effective things
you can do to the YZ to make it
better without spending a whole
lot of money."
The first move for the Yamaha,
Pro Circuit says, is to install their
high-compression piston kit. It's
a quick and simple way of giving
the YZ more torque and power
across the board. And there are
no repercussions, not even when
it comes to reliability, since Pro
Circuit's high-comp racing piston
is stronger than the stock piston
and comes with a more durable
coated wrist pin. And the good
news is that you don't have to
run high-dollar race fuel. Good
quality premium pump gas will
suffice. Race gas, however, cer-
tainly won't hurt, but you will have
to do some mapping alterations if
you decide to go that route. For
just a $360 investment, the high-
comp piston kit for the YZ is a no-
brainer.
The single most expensive
mod that we did to our Loretta
Lynn's project YZ was swapping
out the stock exhaust system for
Pro Circuit's Ti-6 Pro Titanium
System with carbon end cap.
That'll set you back nearly $1200,
but you were going to get a new
exhaust system for your bike
anyway, right? Everyone does.
Guess how many bikes we saw
on the start line at Loretta's that
still had stock pipes? Not many.
And you don't see many at local
races, either. Aftermarket ex-
haust systems just seem to go
with the territory.
The Ti-6 Pro Circuit pipe is just
Our YZ gave Kelley the power he
needed to make many passes.
