My hose lost radiator fluid on my 04 Honda shadow aero 750 so I may as well change the radiator fluid. How do I do this?

Yes, there IS a clutch safety switch.

http://www.bikebandit.com/houseofmotorcycles/2005-honda-shadow-aero-750-vt750c-handle-switch/o/m151126sch409843

Item #8

just start the bike up and shut the petcock off and let it run till it dies carbs will be clean no gas

0.73 in for a 04 750 honda "nighthawk"

Usually on the final gear drives there isn't a specific measurement. Usually there is what's called a weep hole. It's the fill hole. You drain the final drive from the bolt on the lower side , then there should be a smaller hole towards the top. usually is a phillips head screw. Or it could be a bolt with a washer on it. you fill the cavity until the fluid starts leaking out the fill hole. let it finish leaking out. then replace the screw. That's it.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_5bac37c3cb991fdb

how's the battery on the bike? weak battery - speedometer won't work correctly. had the same prob with my 04 750. replace battery