VINTAGE HUSQVARNA FORKS
1975 - 1987 Early Husky forks are mushy yet very harsh. There are a number of things that need to be done but, in the end, they work really well.
PISTON RINGS: The piston rings are vital to the proper operation of the fork. The stock piston bands wear out and often break. They are obsolete from the factory so we've produced hi-performance replacements for the 35 (FPPR HQ35) and 40mm (FPPR HQ40) forks. These piston rings are made from a PTFE material and decrease friction while sealing very well.
FORK SPRINGS: Of course the fork spring rate is way too soft (as are all forks of this era). Give us a call about what is available. A NOTE TO EXPLAIN THE USE OF SMALLER EMULATORS: We have special Emulator Adapters for these unique damping rods. The Adapters are designed to fit 33 and 38mm Emulators, not 35 and 41s. The reason is, these are NOT conventional damping rods as they do not have a check valve in the bottom of the fork tube (see illustration of the compression stroke at the right). The piston ring acts as the check valve and feeds from the top instead of the bottom. The smaller Emulators are used because, with this design, oil MUST flow around the outside of them to fill the rebound chamber (chamber B) on the compression stroke. If the larger Emulators are used there will not be enough clearance, the fork will cavatate, and there will be a dramatic loss of damping. â–ºClick here to see how Conventional Damping Rod Forks and Emulators work. 
REBOUND STROKE: On the rebound stroke (lower right image) notice the piston ring has moved to the top of the groove closing off the rebound chamber (B) below it. Oil is forced through the rebound orifices in the damping rod creating rebound damping. On the Emulator the refill check valve is open allowing oil to go down through the center of the damping rod and refill chamber A â–ºInstallation Details... |