Front Spring FJR1300A

【HYPERPRO 22032320 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 accordance with the suspension's movement.
It maintains a state that is neither too soft nor too hard, and also has the strength to withstand high-load cornering and sudden braking.
●Optimizes the change in caster during braking before a corner, making it easier to transition to the next action. It absorbs minor bumps during cornering, eliminating vibrations that interfere with the rider.
●Unlike ordinary springs, there is no constant spring rate, so there is no resonance.
●Springs wound by computer-controlled machine tools are shot-peened to remove microscopic scratches on the surface that lead to performance degradation. Furthermore, each spring undergoes a performance inspection by a tester after completion.
●In the Netherlands, Hyperpro's home country, Hyperpro springs are installed on all emergency motorcycles.
Compatible models
YAMAHA FJR1300A '13-'15 (ABS compatible)
Specifications
Spring part number: 1139
Fork oil viscosity/level: SAE15/230mm
Preload adjustment: 3rd stage +/- 2
Sag value: 30mm
Compression adjustment: 15 clicks back +/- 4
Rebound adjustment: 6 clicks +/- 2
Setting notes: Collar press-fit side facing down. Tapered side facing up. Remove the genuine spacer, continue to use the washer plate.
*Images are for illustration purposes only. Product designs and specifications shown may change without prior notice. Please understand.