Headlight when cranking

1982 750LTD  Should the headlight cut out while cranking the engine?  

I had a couple Honda (!) Interceptors in the mid 80's (84 and an 86) and the headlight was always on when ignition was on but the headlight went out while the starter was operating, so I wouldn't be surprised if yours is the same. That was when the manufacturers added daytime running lights.

Mine does not turn off when cranking the engine.  That, coupled with the fact that my starter seems weak  makes the bike not want to start when warm.  I'm getting a little over 8 volts at the coils when cranking

Mine comes on as soon as you push the starter button. Have you checked the battery, Have someone check it with a load tester if you can.

What is the battery voltage when you get 8v at the coils, if you connect your voltmeter red to battery positive and black to the positive side of your coils the reading will be the difference between the two points (should be no more than 0.5v)

reading is 0.86