2002 honda shadow 750 ACE won't start

Pull the plug out and test it on the frame. If no spark you need new plugs. If it does spark look at the plug. If the plug is black and wet it is getting to much fuel and flooding. You will need to adjust your carb's air to gas mixture.

Check the wiring connections inside the headlamp shell. They tend to pull apart from vibration and corrode from water entry into the shell. If the start button is indeed frozen (will not move at all)--replace it. Hope this helps!

1 - There are many possible variables here, such as added accessories, load, road, wind, etc., but the strictly stock bike will probably be the least stressed at 45 to 55 mph in 5th gear, although this engine is so understressed by design, that riding as fast as it will go is not likely to cause any damage.

2 - The ACE 750 has a loyal following of fans, and you can find them on the web by googling "honda 750 ace"; they know what works and what doesn't, and are more than willing to help.

charging device or voltage regulator is faulty.

Yes the tab should spin when the wheel turns