Yamaha YFM400FAR, Service Manual

Page: 31 / 481

2 - 6
SPEC
Stem runout limit ---- 0.01 mm
(0.0004 in)
Valve seat width IN 1.2 ~ 1.4 mm
(0.0472 ~ 0.0551 in) ----
EX 1.2 ~ 1.4 mm
(0.0472 ~ 0.0551 in) ----
Valve spring:
Inner spring
Free length IN 39.9 mm (1.57 in) 37.9 mm
(1.49 in)
EX 39.9 mm (1.57 in) 37.9 mm
(1.49 in)
Set length (valve closed) IN 33.6 mm (1.32 in) ----
EX 33.6 mm (1.32 in) ----
Compressed pressure
(installed)
IN 104.9 ~ 120.6 N (10.70 ~
12.30 kg, 23.58 ~ 27.11 lb) ----
EX 104.9 ~ 120.6 N (10.70 ~
12.30 kg, 23.58 ~ 27.11 lb) ----
Tilt limit IN 2.5°/1.6 mm
(2.5°/0.06 in)
EX 2.5°/1.6 mm
(2.5°/0.06 in)
Direction of winding
(top view)
IN Counterclockwise ----
EX Counterclockwise ----
Outer spring
Free length IN 43.27 mm (1.70 in) 41.27 mm
(1.62 in)
EX 43.27 mm (1.70 in) 41.27 mm
(1.62 in)
Set length (valve closed) IN 36.6 mm (1.44 in) ----
EX 36.6 mm (1.44 in) ----
Compressed pressure
(installed)
IN 235.4 ~ 251.1 N (24.00 ~
25.60 kg, 52.91 ~ 56.45 lb) ----
EX 235.4 ~ 251.1 N (24.00 ~
25.60 kg, 52.91 ~ 56.45 lb) ----
Item Standard Limit
*
MAINTENANCE SPECIFICATIONS