Suzuki RA410 Manual page 308

Valve Springs
1
For intake valves
ID paindt color: Lighft green
For exhaust valves
ID paint color: Orange
1. ID paint
ID paint color: Pink
Referring to data given below, check to be sure that each spring
is in sound condition, free of any evidence of breakage or weak-
ening. Remember, weakened valve springs can cause chatter,
not to mention possibility of reducing power output due to gas
leakage caused by decreased seating pressure.
Item
Valve spring
free length
Valve spring 9.7– 11.3 kg for 28.5 mm
preload (21.4 – 24.9 lb/1.12 in.)
Item
Valve spring
free length
Valve spring 13.5 – 15.5 kg for 28.5 mm
preload (29.8 – 34.2 lb/1.12 in.)
Item
Valve spring
free length
Valve spring 13.5 – 15.5 kg for 28.5 mm
preload (29.8 – 34.2 lb/1.12 in.)
Spring squareness:
Use a square and surface plate to check each spring for square-
ness in terms of clearance between end of valve spring and
square. Valve springs found to exhibit a larger clearance than
limit given below must be replaced.
Valve spring squareness limit: 2.0 mm (0.079 in.)
ENGINE MECHANICAL 6A4-49
Standard
33.13 mm
(1.3043 in.)
Standard
36.11 mm
(1.4265 in.)
12.0 kg for 28.5 mm
Standard
36.30 mm
(1.4291 in.)
12.0 kg for 28.5 mm
Limit
32.30 mm
(1.2716 in.)
8.5 kg for 28.5 mm
(18.7 lb/1.12 in.)
Limit
34.80 mm
(1.3700 in.)
(26.4 lb/1.12 in.)
Limit
34.80 mm
(1.3700 in.)
(26.4 lb/1.12 in.)