That probably means you're not on compression but on the moment the valves are closing/opening.
Turn the flywheel one full revolution further and you should be ok.
I removed the bank sensor (and connected the two wires) more than a year ago with no problems. I also have a lanyard kill switch.
The aluminium tank bottom is not only a good weight saving, there's the possibility that the steel tank bottom might rust and cause fuel problems.
