Following the Joe Gibbs Racing philosophy, your suspension will be returned looking nearly identical to what’s
found on JGR’s race bikes. JGR Kashima coats the outer
fork tubes, which is done in Japan. The shock shaft and
lower fork tubes are DLC-coated. A suspension tech
installs Suspension Direct spring seats and aluminum-free
bushings in the forks. A larger shock bladder cap is
installed for more nitrogen volume. The stock fork
axle lugs are bead-blasted by JGR for a raw
aluminum look, because they’re easier to clean and won’t
get pockmarked by roost. Additionally, the stock steel
shock spring is replaced by an RCS titanium spring.
Understand that JGR went whole hog with the YZ250F
suspension. It’s possible to pick and choose the various
modifications to fit your budget. JGR will do everything
from a basic re-valve to the whole kit and caboodle,
which is what we tested. Naturally, the JGR adjustable
pull rod and subframe were also featured in this test
and can be purchased separately. MXA has had good
luck with both products.
Overall, the suspension worked very well. The settings
were geared towards a 135-pound rider. Taking that into
account, we were impressed with how well the forks
stayed up in the stroke for our heavier testers. After
breaking through the crust of the initial part of the
travel, we were pleased with the fork’s ability to soak up
medium-sized chop without blowing through. As for the
shock, it was under-sprung for our crew but didn’t do
anything offensive. Look for a complete review of JGR-
tuned suspension in a future issue of MXA.
OTHER UPGRADES: We cannot forget the efforts
of several aftermarket companies in making the JGR
Yamaha YZ250F a reality. The Raptor titanium footpegs
were a welcome addition, as were the Pirelli Scorpion
MS- 32 tires, Dubya wheels, Galfer 270mm front brake
rotor, Renthal bars and grips, Factory Effex graphics
and Cycra plastics, which actually offer a performance
advantage. Very cool.
WHAT DO WE REALLY THINK? It’s hard to
quantify the value of spending more money on engine
and suspension modifications than the retail price of a
new bike; however, the results speak for themselves. The
Joe Gibbs Racing-tuned Yamaha YZ250F is a marvelous
example of what can be done in the hands of masterful
Stock gearing on a YZ250F is 13/50. The JGR built machine
could pull 13/49 due to the added ponies to the rear wheel.
For improved pucker power, a 270mm Galfer rotor was
installed. We have had great luck with this rotor in the past.
The Cycra Powerflow radiator wings allowed this fire breathing dragon to breathe when the throttle was wide open.
We have a lot of experience with Cycra’s Rebound hand
guards. They protect our hands without knowing they’re there.