My Gilera SC 125 seems to be getting too much oil in the gas. Sometimes it's hard to start and we need to change the spark plug? Any idea? Regards Svein

It sounds as though the mixture is way too rich. Is the choke stuck on or malfunctioning? With is dry spark plug but fuel in the carburetor, try turning the fuel valve and choke off and then with ignition on and holding the throttle at least 1/2 open, kick the engine over several times. If it starts under these conditions then perhaps the float(s) in the float bowel have leaked and are full of gasoline causing the fuel to flow continuously into the throat of the carb then into the engine. It probably is some sort of carb mixture setting, choke or needle valve/float problem.

GILERA RUNNER ST 125 and VX Motul MotoCool Expert 1L Bottle COOLANT ANTIFREEZE ebay about £8

coil lead plug cap needs replacing , no shield to protect spark plug from getting wet due to weather/water splash. electrical spray lubricant requires from damp start problem

The Gilera SC125 does not have an oil filter, the two stroke oil from the oil tank lubricates the engine by injection into the inlet with the petrol. The oil in the engine is only for the gearbox and clutch. If you want to change this drain it by removing the drain plug underneath the engine, refit the plug and refill with the correct quantity of motorcycle gearbox oil or good quality engine oil. do not use an EP rated oil or the clutch will slip.

Check the spark plug or fuel filter, or you might have a little water in the gas use dry gas in your tank

the fuse idea is complete rubbish do not attempt !!!!

Change the spark plug, that may help. <div>Regards</div>

first thing to check is all the wiring for any damage or incase something has just come unplugged before getting the cdi unit checked and is the ignition switch in good condition??

Sounds like your oil/ fuel mixing valve may need to be replaced. New gaskets for it at least. Hopefullly your engine gaskets are ok, that's the first thing I thought of until I saw it was a 2 stroke.