BRP Johnson 4HP Service Manual page 17

Item
VALVE/VALVE GUIDE
Valve diameter
Valve clearance (Cold engine
condition)
Valve seat angle
Valve guide to valve stem
clearance
Valve guide inside diameter
Valve guide protrusion
Valve stem outside diameter
Valve stem deflection
Valve stem runout
Valve head radial runout
Valve head thickness
Valve seat contact width
Valve spring free length
Valve spring tension
Unit
IN mm (in)
EX mm (in)
IN STD mm (in)
EX STD mm (in)
IN —
EX —
IN STD mm (in)
Limit mm (in)
EX STD mm (in)
Limit mm (in)
IN,EX STD mm (in)
IN,EX STD mm (in)
IN STD mm (in)
EX STD mm (in)
IN,EX Limit mm (in)
IN,EX Limit mm (in)
IN,EX Limit mm (in)
IN,EX STD mm (in)
Limit mm (in)
IN STD mm (in)
EX STD mm (in)
STD mm (in)
Limit mm (in)
STD N (kg, Ib)
Limit N (kg, Ib)
GENERAL INFORMATION
Data
24.0 (0.94)
22.0 (0.87)
0.03 – 0.07 (0.001 – 0.003)
0.03 – 0.07 (0.001 – 0.003)
15°, 45°
15°, 45°
0.025 – 0.052 (0.0010 – 0.0020)
0.075 (0.0030)
0.045 – 0.072 (0.0018 – 0.0028)
0.090 (0.0035)
5.500 – 5.512 (0.2165 – 0.2170)
11.0 (0.43)
5.460 – 5.475 (0.2150 – 0.2156)
5.440 – 5.455 (0.2142 – 0.2148)
0.35 (0.014)
0.05 (0.002)
0.08 (0.003)
1.0 (0.04)
0.5 (0.02)
0.8 – 1.0 (0.03 – 0.04)
1.0 – 1.2 (0.04 – 0.05)
29.5 (1.16)
28.3 (1.11)
139 – 159 (13.9 – 15.9, 30.6 – 35.1) for 19.3 mm (0.76 in)
127 (12.7, 28.0) for 19.3 mm (0.76 in)
*SPECIFICATIONS
1-11