Yamaha RS90K Manuel D'atelier page 747

Model
Shock absorber: Damping force
Extension
Compression
MAINTENANCE SPECIFICATIONS
RS90/RS90R/RSG90/RS90M/RST90/RST90TF
1,400 N/0.3 m/s (142.8 kg/0.3 m/s, 315.1 lb/0.3 m/s)
(RS90/RS90R/RSG90)
840 N/0.3 m/s (85.7 kg/0.3 m/s, 189.0 lb/0.3 m/s) (RS90M)
1,180 N/0.3 m/s (120.3 kg/0.3 m/s, 265.2 lb/0.3 m/s)
(RST90/RST90TF)
570 N/0.3 m/s (58.1 kg/0.3 m/s, 128.1 lb/0.3 m/s) (RS90/
RS90R/RSG90/RS90M)
460 N/0.3 m/s (46.9 kg/0.3 m/s, 103.4 lb/0.3 m/s) (RST90/
RST90TF)
9-16
SPEC