RA GP125i, Maintenance Manual

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3
Remove the spark plug cap, connect the spark plug, let the spark plug on the
engine block, start the engine, check whether there was continuous blue and
white high pressure fire.
Inspect ignition system
4 Softly turning throttle, observe whether easy to start.
Cleaning throttle and
idle airways
5
Check whether the air filter is clogged, and whether there is a leak in the intake
port (especially the intake pipe connection).
Inspect intake system
6 Check spark plug and observe the type and clearance adjust or replace
7 Check engine cylinder pressure to see if there is insufficient cylinder pressure.
Exclude engine
mechanical failure (pay
attention to check
whether engine valve
clearance is too small).
8
Check whether the fuel label (and whether it contains ethanol) meets the
requirements of the vehicle.
replace fuel