Yacugar Fork Springs / Progressive Fork Springs / BMW F650GS Dakar
YACUGAR FRONT FORK SPRINGS / Progressive rate of 5.5 N/mm to 9.0 N/mm (stock rate is 5.0 N/mm) for reduced nosedive and resistance to bottoming in more off road riding conditions. For more street riding comfort see our Wilbers fork spring option with a reduced progressive rate.
Yacugar Progressive Fork Springs have several advantages over linear springs. A Progressive Rate Spring has the advantage of a rising rate resistance to compression. The benefit of this is that the spring can be soft enough at the start of the travel to offer a "plush" ride, yet be firm enough at the end of the travel to soak up the big bumps and dramatically reduce nose-dive under deceleration and braking.
Please note:
7wt oil is recommended for general purpose and for more dirt road riding.
10wt oil is recommended for sport-oriented street riding.
Air chamber for mixed use is 150mm with springs removed and forks completely compressed. This can be reduced to 120-130 mm for more adventurous off road riding.
Instructions for setting air chamber:
1) Remove fork spring and drain old oil.
2) Compress fork fully with spring removed.
3) Add oil until oil level is the prescribed distance from the top of the tube - this is your air chamber.
Piston rods should be pumped several times to dispel any remaining air before final measurement is made.
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