Ok, so i bought a blown xl1200 ltd not too long ago, i bought a new bottom end and purchased a top end from sbt and rebuilt the whole ordeal. i got everything back into place put a new battery in it and took it around the corner to the lake. it wouldnt start. so i replaced starter solenoid and it got it to crank but not turn over. there is no spark to the plugs. and when i was trying to crank it. it was fine then it started cranking by its self. without me hitting start button.

carbs have been cleaned and checked out.
all new motor
replaced starter solenoid.

please HELP!!!!

thanks in advance