I own a 2 stroke Gilera Runner 180.

I have had it for 5 years now and approx a year ago I had a problem at full speed. The problem was that when I was reaching a certain speed (80kmp) the engine would die, if I pulled back on the accelerator and went at 79kmp it would go ok but would die if I accelerated any faster.

Because it was sat for a while without being started, I charged the battery and tried starting it up but with no luck.

I changed the spark plug, oil and drained and the old petrol and put in new.

Still with no luck starting.

I took off the carburetor and gave it a good clean and put it back on, tried starting but still with no luck. Should there be fuel in the area where the bouy is? because there doesnt seem to be.

I put a bit of fuel in the carburetor and with luck it started but as soon as it got used up it would die.

I took all the panels off and checked the wiring and pipes. Everything seems to be ok.

There is fuel in the 2nd small tank that leads from the main fuel tank. Every time I kick start, fuel enters the 2nd small tank.

If I disconnect the fuel pipe that leads to the carburetor, fuel comes out.

Any help would be much appreciated.

Kyri, September 2010

these bikes run a pneumatic fuel pump and also have a one way fuel valve inline so make sure both are piped up and no leaks or splits are in the lines,runners are a bit fiddly to take apart the panels are very long and big on the sides.

adam bike doctor, October 2010

Thanks Ray for your prompt reply:)
I remember fidling around with the needle because it was getting jammed, it wasn't a smooth up and down motion. I'll take it apart again tonight and will check.
If I find that there is fuel in it can there be something else I can check? There also a screw on the bottom side of the carb, is there a exact setting for that?
Could there be a problem with the fuel tap or the air intake?

Thanks once again:)

Kyri, September 2010

when bottom of carb is removed, there should be plenty of petrol in the bowl. check the needle on top of the float. it could be sticking in .if so remove it and clean.

ray, September 2010