Honda WT20X Owner's Manual page 47

Noise
Model
Sound pressure level at the workstation
(EN ISO 20361: 2015)
Uncertainty
Measured sound power level
(2000/14/EC, 2005/88/EC)
Uncertainty
Guaranteed sound power level
(2000/14/EC, 2005/88/EC)
Tune-up
ITEM
Sparkplug gap
Valve clearance
Other
specification
44
SPECIFICATION
0.7–0.8 mm (0.028–0.031 in)
WT20X K4 IN: 0.08±0.02 (cold)
EX: 0.10±0.02 (cold)
WT30X K4 IN: 0.05±0.02 (cold)
WT40X EX: 0.20±0.02 (cold)
No other Adjustment needed.
WT20X K4 WT30X K4
92 dB (A) 95 dB (A)
3 dB (A) 2 dB (A)
103 dB (A) 108 dB (A)
3 dB (A) 2 dB (A)
106 dB (A) 110 dB (A)
WT40X K3
96 dB (A)
2 dB (A)
110 dB (A)
2 dB (A)
112 dB (A)
MAINTENANCE
Refer to page 31
See your servicing
dealer