SEARCHING FOR POWER
There is more than one way to increase the horsepower
output of a machine. You can bolt-on aftermarket goodies such as an FMF 4.1 titanium exhaust system with a
MegaBomb header, Stage 1 Hot Cam, and a Vortex ECU,
or you can tune up some of the parts that come stock.
You could have the crew at Twisted Development remove
WRAPPING IT ALL UP
the backfire screen in the airbox, do some head porting
and remap the Vortex ECU to match all the new engine
work and bolt-on parts. We did all that, but it was still
not enough to satisfy our craving for more power! So,
we did what any logical person would do; we went up in
displacement. After all, when it comes to power, there is
no replacement for displacement, right? Cylinder Works
makes a 3mm big-bore kit that comes with a cylinder,
forged Vertex piston and a Cometic complete top-end
gasket kit—pretty much everything you need except the
mechanic to install it all. We topped off the performance
part of the build with CV4 silicone radiator hoses, a high-
pressure radiator cap, and a complete Hinson Racing
billet-proof clutch system that includes fiber plates, steel
plates, springs, a clutch basket, inner hub, pressure plate
and a clutch cover.
With increasing horsepower out of the way, it’s all about
the extras that complete the overall picture. We added the
complete old-school Yamaha Yellow Powerflow plastics kit
Test rider RJ
all the newfound
of our big FX.
The Cycra Probend CRM Ultra wrap-around handguards have
a sleek look and offer loads of protection.
TM Designworks’ Factory Edition 2 rear chainguides are
designed to stand up to just about any punishment you can
imagine. They are on a lot of our builds because they work.
OFF-ROAD PROJECT | YZ250FX