[GGRide]

Howdy,
I have a Gas Gas EC 250 from 2000~5 in 2T, and I have some problems with it.

It starts very easily, even if I leave it for 1 year, I just have to remove the spark plug, wipe it a little and hit the pedal 2-3 times and it starts. But if I drive it for some time, 15-30 min, it dies suddenly *or stops accelerating* and doesn't start again, and if it starts, it starts very hard (40-50 pedals).

I once had problems with the Coil, a screw came loose and after I tightened it it went ok.
I don't remember that well, but it seems that the spark was weak.

Could the Coil fail like that? I'm thinking of buying an original one and trying it on.

Or should it be the carburetor? It has a Keihin carburetor, and as far as I know, those are quite good and don't break down like that.