Ok, first thing, when I turn on the gas, there is a huge leak that seems to be coming out of the main jet on the bottom of the carb. Not just a drip but a steady stream. Also, when the plug and the exhaust pipe are in, it's harder to start and no lights come on. However, when the pipe and plug are out the engine turns over nicely, sounds good and the lights come on when i pedal. If the lights come on this means I have spark right ? I did the plug on the head test but it was bright out and my friend said he could see a bit of a blue spark. Now I'm assuming this has to do with the compression being released because of the plug hole and the exhaust hole being open, therefore it'd be much easier to turn the engine over because the compression is escaping. Keep in mind I'm not using the decompression, but the new unit came today so I should be able to get that back in order. It's got a new top end including cylinder, piston, rings, gaskets, so I think it's a problem with the carb. Any help is appreciated !!!! Thanx !!!