Suspension technology has evolved at a rapid pace over the past five years. Air forks appear to be the new
frontier, but they’re not for everyone. In the off-road arena,
having a reliable spring fork that retains its spec is key.
Finding the right tuner to valve and set up your suspension
can be a crapshoot, but the really good suspension tuners
have found ways to give the people what they want. That’s
exactly what Cal Northrop, owner of FTI Suspension in
Thomasville, North Carolina, has done.
Cal Northrop has an extensive background in off-
FTI SUSPENSION’S KAYABA-EQUIPPED HUSKY FC250
road and motocross, modifying suspension and building
engines for top professional racers and weekend war-
riors alike; however, he’s more than a shim swapper or
oil-changing grunt. Northrop is an engineer, proven by
the fact that he designed a WP 4CS conversion kit that
allows Kayaba SSS internals to be housed inside the 4CS
stanchions. It’s no secret that Kayaba’s Speed Sensitive
System (SSS) fork is perhaps the best spring fork available.
Unfortunately, it only comes on Yamahas. Yes, it’s true that
TM also uses a version of the Kayaba SSS fork, but TM’s
valving isn’t comparable to what comes on Yamaha bikes.
What do you do if you ride an older KTM/Husqvarna and
hate the WP 4CS forks? You call Cal Northrop, which is
exactly what we did.
The guys at Cycra Racing were instrumental in this
It looks like a WP fork,
but the internal parts