Yamaha RS90RK, Service Manual

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9-9
SPEC
MAINTENANCE SPECIFICATIONS
POWER TRAIN
Model RS90/RS90R/RSG90/RS90M/RST90/RST90TF
Transmission:
Type V-belt automatic
Range of ratio 3.8 ~ 1.0 : 1
Engagement speed r/min 3,300 ~ 3,700 r/min (RS90/RS90R)
3,400 ~ 3,800 r/min (RSG90)
3,800 ~ 4,200 r/min (RS90M)
3,000 ~ 3,400 r/min (RST90 “USA/Canada”)
2,800 ~ 3,200 r/min (RST90 “Europe”/RST90TF)
Shift r/min 8,250 ~ 8,750 r/min
Sheave distance 267 ~ 270 mm (10.51 ~ 10.63 in)
Sheave offset 13.5 ~ 16.5 mm (0.53 ~ 0.65 in)
Secondary sheave free play (clearance) 1.0 ~ 2.0 (0.04 ~ 0.08 in)
Secondary sheave clearance 35.0 ~ 35.8 mm (1.38 ~ 1.41 in)
V-belt height (standard) –0.5 ~ 1.5 mm (–0.02 ~ 0.06 in)
V-belt:
Part number/Manufacturer 8DN-17641-00/MITSUBOSHI
Circumference 1,129 ~ 1,137 mm (44.4 ~ 44.8 in)
Width “A” 34.5 mm (1.36 in)
Wear limit “B” 32.5 mm (1.28 in)
Primary sheave spring:
Part number 90501-582L1 (RS90/RS90R)
90501-552L5 (RSG90)
90501-603L3 (RS90M)
90501-583L4 (RST90 “USA/Canada”)
90501-582L7 (RST90 “Europe”/RST90TF)
Color code Yellow-Silver-Yellow (RS90/RS90R)
Blue-Green-Blue (RSG90)
Green-White-Green (RS90M)
White-Silver-White (RST90 “USA/Canada”)
Yellow-Green-Yellow (RST90 “Europe”/RST90TF)
Diameter 59.5 mm (2.34 in)
Wire diameter 5.8 mm (0.228 in) (RS90/RS90R/RST90/RST90TF)
5.5 mm (0.217 in) (RSG90)
6.0 mm (0.236 in) (RS90M)
Preload 343 N (35.0 kg, 77.2 lb) (RS90/RS90R/RST90 “USA/
Canada”)
392 N (40.0 kg, 88.2 lb) (RSG90/RST90 “Europe”/
RST90TF)
441 N (45.0 kg, 99.2 lb) (RS90M)
Spring rate 24.5 N/mm (2.50 kg/mm, 140 lb/in) (RS90/RS90R/RST90
“Europe”/RST90TF)
19.6 N/mm (2.00 kg/mm, 112 lb/in) (RSG90)
27.0 N/mm (2.75 kg/mm, 154 lb/in) (RS90M)
22.1 N/mm (2.25 kg/mm, 126 lb/in) (RST90 “USA/Canada”)
Number of coils 4.92 (RS90/RS90R/RST90 “Europe”/RST90TF)
4.91 (RSG90)
5.08 (RS90M)
5.25 (RST90 “USA/Canada”)