Kreft Moto to the rescue
WP 4CS SUSPENSION MODS | KTM 450SX-F
The truth of the matter behind our KTM 450SX-F (actually,
all of the WP 4CS fork-equipped
machines) is that the fork is a
Walmart picnic utensil placed on
an Italian hemstitched-linen napkin
at an elegant four-star restaurant.
It really doesn’t fit with a machine
that has few itches that require
medicine. We have already tested
the new WP air fork on the 2016
Factory Editions, and word on the
street is that this fork was supposed to come stock this year (like
it did in Europe). But, the U.S.-based KTM decision-makers opted
for a spring unit in spite of the fact
that the new “air” damper is a huge
improvement over the 4CS fork.
The main issue with the 4CS fork is that it’s harsh,
lacks any ability to dial in low-speed damping and does
little more than absorb bumps and hack with a C grade.
That’s the bad news. The good news is that this opens up
a whole world of possibilities for the suspension tuners,
though picking the right guy for the job is a job in itself.
We’ve tested lots of suspension mods and, honestly, most
of them go sideways and cost a fortune.
This story is mainly about getting the suspension to
perform better on the variety of terrain we like to ride. As
you’ll come to find out, the boys at Kreft Moto are adept
specialists. They came up with a great setting right out of
the hole. These mods certainly didn’t come cheap, but they
were definitely worth it.
THE 4CS SOLUTION VIA KREFT-TUNED
Kreft most definitely attempted to start with a fresh canvas rather than subtly paint in new valving specs for the
4CS damper. The Kreft conversion will set you back $950.
It includes the labor to rebuild and re-valve the forks, as
well as adding the Kreft compression adjusters, Kreft base-
Kreft says the stock 4CS has a weak base valve and a lot of
fixed bleed (holes) in the cartridge, which leaves the mid-valve
responsible for almost all the work. The result is a poor balance of low-speed and high-speed compression damping. The
Kreft Conversion incorporates design updates that convert
the fork into a sealed and pressurized twin-chamber design.