Front Spring FJR1300A

【HYPERPRO Hyperpro 22031410 Front Spring FJR1300A Suspension Fork Spring】
■Front Spring
Suspension springs with a constant rising rate, uniquely designed by Hyperpro.
The spring rate constantly changes in response to the suspension's movement.
It maintains a state that is neither too soft nor too hard, while also providing the strength to withstand high-load cornering and sudden braking.
●Optimizes caster changes during braking before a corner, facilitating the next action. It absorbs small bumps during cornering and eliminates vibrations that would interfere with the rider.
●Unlike conventional springs, it does not have a constant spring rate, so it does not resonate.
●Springs wound by computer-controlled machine tools are shot-peened to remove microscopic surface scratches that could lead to performance degradation. Furthermore, after completion, each spring undergoes a performance inspection with a tester.
●In the Netherlands, Hyperpro's home base, all emergency motorcycles are equipped with Hyperpro springs.
Compatible models
YAMAHA FJR1300A '01-'12
Specifications
Spring part number: 1139
Fork oil viscosity/level: SAE15/230mm
Preload adjustment: 3rd step +/- 2
Sag value: 30mm
Compression adjustment: 15 clicks back +/- 4
Rebound adjustment: 6 clicks +/- 2
Setting remarks: Collar pressed in facing down. Tapered end facing up. Remove the genuine spacer (outer diameter 12mm/length 150mm) and use the washer plate as is.
*The image is for illustration purposes only, and the design and specifications of the products shown are subject to change without notice. Please be aware of this.