wont start

[clerky clerk]

Hi all. After rebuilding the top end and re-assembling everything I tried kicking over my bike but it will not fire, I tried this for approx 4 hrs but with no joy. There is a good spark and there is fuel but for some reason unknown to me it will not fire up. Please help?

[rupecopp]

what bike is it? might help with the answers.

[clerky clerk]

Originally Posted by rupecopp

what bike is it? might help with the answers.

its a gas gas ec300 year 2000, thamk you

[jostby]

You say there is fuel but is the plug getting wet, an indication the fuel is actually getting to the cylinder? If you had the carb off and the fuel drained out of the bowl, I have seen needles dry and stick in the closed position while the carb was laying on its side. Light taps with a heavy screwdriver handle on the bowl of the carb will usually unstick it. A 2nd thing to try (only if the plug is dry), lean the bike onto it's side until gas dribbles out of the overflow tubes then try it again. That will give a little extra fuel to the cylinder. Hope this helps.

[WoodsRider]

I'm going to assume it was running before you rebuilt the top-end.

1) Did you install a new piston?

2) Did you orient the piston correctly (arrow pointing forward to the exhaust port)?

A piston installed backwards, on a 2-stroke, won't properly scavenge.

[clerky clerk]

yes the bike was running, and yes the piston is arrow foward, the carb hasnt been touched and can still flood easily (usual ec300 there) the piston is wet, I have even poured a little down the barrel and tried from there and I tried a more explosive liquid called isopropanol wich is highly volatile but with no avail.