Rato R80, Maintenance Manual, Page: 26 / 79

Part III Maintenance
22
3-4 Cleaning of fuel filter
● Fireworks are strictly prohibited
during cleaning.
● After tightening, it should be confirmed that
there is no fuel leakage.
Set the fuel switch to the "OFF" position and
tighten the filter
oil cup. Tightening torque: 7N.m.
3-5 Cleaning and adjustment of spark plug
1) Use the spark plug cleaner or wire brush to
remove the carbon deposits on electrodes.
Check whether the sealing washer is
damaged.
2) Use the spark plug gauge to check the clearance
between the central electrode and the side
electrode.
Bend the side electrode to adjust the clearance
in case of an unsatisfactory clearance.
Clearance of spark plug 0.7 - 0.8 mm
Standard spark plug
BP6ES (NGK)
F7TC (Nande)
BPR6ES (NGK) ………for EWI suppression
F7RTC (Nande)………for EWI suppression
3-6 Adjustment of valve clearance
The valve clearance should be adjusted in the state of the gasoline engine
cooler.
1) Remove the cylinder head cover bolt, the cylinder head cover and the cylinder head cover
gasket.
Please note that there will be oil leakage when the cylinder head cover is
disassembled.
Clearance of
spark plug
0.7-0.8mm
Side
electrode
Wire brush
OFF
O ring
Filter oil cup