Gilera Motorcycles - Recent Questions, Troubleshooting & Support

more likely a fuel hose problem.. could be a clogged filter, a pinched hose even a dirty carburetor .. it's not a tight clog it just slows the fuel enough to starve the engine then over time it drips enough fuel into the carb to allow start and run for a short while before clogging again

One bolt .. accessed under the rear mudguard.. top centre.. once undone slide back to release the clip at rear...

A good rule of thumb is they have to be over 100psi to start and run. I have found they can be up to 170psi on pump gas.

Adjust engine oil level switch at back of engine then your ok assuming that the oi level is ok in the first place.

put a 172cc kit on it.....& try some new rollers if its slow to get to 40mph

First check your main fuse, then check the fuse in the starter relay.

RH side of the bike, on the frame rail heading upwards behind the passenger footpeg

Hi, Rado it sounds like you need the valve clearance checked. It sounds like it is a bit tight and needs to be adjusted.

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.

CHECK THE CABLES THAT GOES TO THE SPARK PLUGS. IT MIGHT BE LOOSE OR BROKEN.

manual Brakes start 219 http://www.bellamoto.rs/upl/files/NEXUS/Nexus%20250%20i.e.%20E3%20MY%202006%20TEHNICKO%20UPUTSTVO.pdf

Possible warped/cracked head or cylinder wall.

Don't do the gas down the spark plug thing. It's a bad idea. Do the following >
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side or bottom of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
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Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

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If its a 2 stroke try fitting "Brand New" Spark plug. If problem persists check plug condition as could have too much 2 stroke coming through via 2 stroke pump, Water in the fuel or poorly setup Carburettor.

Your coil problem, change with the new one.

Try a new spark plug just to rule that out. Sometimes they (spark plugs) just die without warning. Then check the plug lead, to rule that out too. Work back from there, good luck.

Sounds like he may have cracked the cylinder wall.