07 YZ450F Seal & Free Piston Service
NorWest Suspension has you taken care of with all your KYB Dirt repair and service needs!!
Received in a set of 07 YZ450F (KYB) forks for just a seal replacement but upon dis-assembly found the free pistons cracked in both forks, This is a relatively common issue with the KYB twin chamber forks and with a minor investment a fairly easy one to remedy. There are several options to the OEM free piston replacement and shown in the images below is the SDI KYB Free piston, They are manufactured from aluminum and extremely durable compared to the OEM piston.
Here are the images of the cracked OEM piston next to the SDI aluminum piston. SDI top image and OEM bottom image.
Polished fork tube with crosshatch shown here.
Fork tubes together utilizing SKF green seals and layout of all cleaned and ready to re-assemble fork components.
Forks all back together and ready to return home and improve longevity and performance. NorWest Suspension uses only Spectro cartridge fork fluid in all our revalves and servicing.