Development history of HFS system for Classic Trial Motorbikes
HFS® system development for Classic Trial motorbikes started with BULTACO Sherpa model 199A, with private pilots in different races; later and with clear competition orientation, around mid 2009, it was started co-operation with Vitale Máquinas (workshop specialised in OSSA competition and leisure motorbikes reconstruction and set-up). It was chosen a OSSA 250 MAR first series to develop the initial set-up and then to make the first tests.
The steps carried out in order to have available a first reliable prototipe for competition have included intensive tests on-the-track, testing springs with different rate and playing with different set-up pressures in HFS® element. Finally it was defined three different spring rates available for the customer; with this range, it is possible to choose the right option depending on pilot's full weight (including equipment), driving style and even depending on trial track condition.
First Trial race with HFS® system was in Robledo de Chavela 2009, with pilot Arvy Portero driving the OSSA 250 MAR. After the race it was confirmed the different aspects targeted for a real competition (behaviour, stability, adaptability to different tracks and paths, ...); these conclussions were taken as base point for the final condiguration, which is available today.
The next race was the International two days of Robregordo 2009, with two OSSA motorbikes in competition with HFS® . Pilot's feedback after the competition confirmed what was expected regarding HFS® performance.
After the successful start-up in 2009 season, HFS® system will be offered to a wide range of competition Classic Trial motorbikes. With it it will be improved front fork's performance, while nor altering its classic aspect not changing structural components in the front end.
Covered range of HFS® for Classics Trial can be found at this link. Should you do not find your model in current range, do not hesitate to contact us. We can make a study and development for any fork with bars equal or bigger than 35 mm.
