Well i took my Honda Lead 100cc apart yesterday to helicoil the spark plug hole, now ive rebuilt the scooter and it will not start. When i press the start button, the full beam comes on, and when i clip jump leads on to the negative side of the battery there is no power, unless i clip the lead to the frame. Ive also got a feeling it has no spark as i connected jump leads to the starter motor and it just spins over :/ dont suppose anyone knows what ive done, or not done haha
i would start by checking all the connections on the loom near where you have been working, may have disturbed the wiring. also check the earth straps to the engine.
i had a feeling there was a bad earth somewhere, not positive on this but thanks ill check the wiring
on my dirt bike if the coil is not earthed properly it has no spark,espcially when its covered in shit lol