49 Cosmic Cour,Suite "B", Copperopolis ,CA,95228
Tel:5052808022
Vintage Trials Motorcycles Sales / Restoration , Parts & Accesories.
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Suppliers of HFS hybrid fork Suspension
HFS progressive suspension system for Classic Trial motorbikes
HFS (Hybrid Fork Suspension) is a PROGRESSIVE SUSPENSION SYSTEM for non USD forks, combining action of a gas cartridge (air) and an helicoidal spring.
HFS improves motorbike’s original suspension. It is soft at the beginning, being soft at the beginning and reading the track quite well, and it is getting stiffer progressively avoiding suspension bottoming or an excessive dive in braking.
HFS has an influence only in the ‘elastic’ part of suspension: hydraulic damping is not modified. HFS elastic function is achieved with an air cartridge and a spring working in serial.
As air has a progressive behaviour, result is a truly progressive suspension that filters terrain quite efficiently and is getting stiffer as fork travel increases.
HFS is adjustable. Adjustment is performed through pressure setting in air cartridge. It is done depending on rider’s weight or his riding preferences. Riders with bigger weight will apply more pressure than lighter ones. With this, “static sag” will be optimal for both riders, being able to utilize all suspension travel regardless of his weight, for instance.
HFS does not alter the motorbike structurally as it is introduced into the original stanchions. Hydraulic system is not modified.
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