I came across a 1978 cb750f a while ago, which had been sitting for a good 15 years in storage, and took the usual actions like cleaning the carb inside and out (it was bad) and the gas tank (even worse), and now I finally have them both in operating condition. Since the previous owner said it was running up until he stored it I thought it would start up when I plug the carb and gas tank back on. I replaced the battery and turned the key, lights all turned on as expected, put it in neutral and tried hitting the engine start button. All the lights went dim which is normal as the power is diverted to the starting motor, but the starting motor wouldn't turn, not even click or anything.
So I continued and tried the kickstart. The engine would turn over nicely with the kickstart, but it wouldn't start. I then pullled a sparkplug out kept it attached to the cable and kickstarted to see if there was a spark, which there was none.
What should I try to fix first? could it be a valve/piston problem? What would be causing the spark plug and starter motor problems?
