High Altitude Tuning - Yamaha RS90GTZ Service Manual

HIGH ALTITUDE TUNING

Specifications Model: RS90GTZ
Elevation
Production
specification
1,250 ~ 1,350
Engine idle speed
r/min
Engagement speed Approx. 3,300 r/min
Shift speed Approx. 8,250 r/min
Secondary
reduction ratio 24/38 (70 L)
(number of links)
Primary sheave
90501-603L3
spring
Color* G-W-G
Free length 89.8 mm (3.54 in)
441 N (45 kgf,
Preload
99 lbf)
27.0 N/mm
Spring rate (2.75 kgf/mm,
154.2 lbf/in)
Wire diameter 6.0 mm (0.236 in)
Outside
59.5 mm (2.34 in)
diameter
8FP-17605-00
Weight (ID)
(8FP00)
Steel with hole
17.2 (OUT)
Steel 13.3
Weight rivet
(CENTER)
Steel 13.3 (IN)
Roller outer
16.5 mm (0.650 in)
diameter
Primary sheave
None
shim
Secondary sheave
90508-60018
spring
Color* P-P
Free length 75 mm (2.95 in)
70° (1-6)
Preload rate
1,211 kgf•mm/rad
Wire diameter 6.0 mm (0.236 in)
Outside
69.5 mm (2.74 in)
diameter
Secondary torque
43°
cam angle
Secondary sheave
1.0 mm (0.039 in)
shim
*: Color code
G Green P Pink
W White
HIGH ALTITUDE TUNING
~ 800 m 600 ~ 1,400 m
(~ 2,500 ft) (2,000 ~ 4,500 ft)
Standard
←
Approx. 3,350 r/min
←
←
←
←
←
←
←
←
←
←
Steel 13.3 (OUT)
Steel with hole
13.3 (CENTER)
Steel with hole
13.3 (IN)
←
←
←
←
←
←
←
←
←
←
1,200 ~ 2,000 m 1,800 ~ 2,600 m
(4,000 ~ 6,500 ft) (6,000 ~ 8,500 ft)
←
Approx. 3,450 r/min Approx. 3,500 r/min
←
23/38 (70 L) 22/38 (68 L)
←
←
←
←
←
←
←
←
Steel with hole
None (OUT)
13.3 (OUT)
Aluminum with
←
hole 13.3
(CENTER)
None (IN)
←
←
←
←
←
←
←
←
←
←
2-75
INSP
ADJ
2,400 ~ 3,000 m
(8,000 ~ 10,000 ft)
← ←
←
← ←
21/38 (68 L)
←
90501-602L9
←
P-G-P
←
86.7 mm (3.41 in)
392 N (40 kgf,
←
88 lbf)
29.4 N/mm
←
(3.00 kgf/mm,
168.2 lbf/in)
← ←
← ←
← ←
←
None (CENTER)
← ←
← ←
← ←
← ←
← ←
← ←
80° (2-6)
←
1,211 kgf•mm/rad
← ←
← ←
← ←
← ←