My gilera acceletates only to about 30 MPH and from than its stays the same. The engine only will rev up to about 5000. The engine sounds like something is stopping it from revving higher and gaining higher speed. NEED FAST HELP!
First check it is a 125 cc engine. And not a 50 with a 125 body and stickers on it. If it is the 125 then check the timing (ignition) as this will be controlled by a box full of electronics and if only one component fails it could give the same symptoms as you describe.
SOURCE: misfiring at speed on gilera 200 scooter
This sounds more like a lean fuel condition than ignition. If it was stored over the winter without the gas being drained or a fuel stabilizer being added, you'll likely have varnish build-up in the fuel system that is not allowing sufficient fuel flow. If your engine is fuel injected, it's likely your injector is partially clogged. If it's carbureted, your carb jets may be partially clogged or your carb float may be sticking and not allowing the needle valve to fully open. Fill the gas tank with fresh gasoline, but leave enough room for a can of Sea Foam. The Sea Foam may be able to break up the deposits and allow fuel to flow again. However, there's no guarantee and the fuel system may have to be disassembled to be cleaned.
SOURCE: carb tune up gilera runner 50
on the carb you will find 2 screw one will be quite far in than the over thats the one you adjust this is the mixture screw which controlles the air and petrol together unscrew it say 1/4 a turns at a time and see if it improves if it gets worse screw it the oposite way and see if that improves good luck buddy
SOURCE: My Gilera Runner (moped) is losing power and can
helo,
the first thing you are going to do is clean the spark plug,or its better if you try to replaceit.,of you do that but still the problem is the same,then check and set the "timing" if yourt motorcycle is contact point operated,.
But if it is CDI operated,then you have to replace the said CDI.
If you have done all these things but it is still doesnt work good,try to check your ignition coil if it has loosen contacts or it is already defective.
goodluck..
SOURCE: Gilera Runner very difficult to start cold,then cuts out when hot
to check the electric choke..take it/off out of carb & unplug it. then get 2 short lenghts of wires, strip both ends...shove one end into the choke plug teminals(one in each hole) .then put one of the striped ends of thewires on a charged battery(one on the positve & one on the negitvie terminals) .keep them on for about 5 mins & you should see the choke head extend (you could always mesure it befor you put to battery & check in 5mis to see if extened!!) this will tell you if its working!!...if its not working this will explane why you have trouble starting from cold!!..it also sounds like the main jet is blocked...this is found by taking of the float bowl (as you may know!)it will prob be the small hole up the middle of the jet that is made up with muck!!...try sticking a strand of a wire brush up/threw it...also it sounds like the exhaust is leaking round the maifold..will have to take exhaust of & check if it need a new gasket..or resealing!!(does the exhaust blow?. this is good way to tell if it is leaking(put a rag/palm of hand over end of exhaust & you should beable to hear it blowing. ...hope this helps....Howard
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