1984 Honda Shadow VT700 Taillight/All other rear.

You can view a generic service manual here: http://hrca.honda.com/

First try to clean the carbs and sync them and change the spark plugs. 210 should be o.k.

Clean and rebuild the carbs as a first step. Is it a ping, knock, or rattle?

there is 2 spots you can adjust your clutch.

1. on your clutch leaver there should be a tension screw where the cable goes in if you need more clutch you have to make sure to bring the screw out a bit

2. down on the side of your motor you will see a cable going in there should be a sleeve covering the cable pull up the sleeve and tighten the slack by bringing the screw out a bit.

good luck.

Pretty sure the vt700 shadow of that year uses a hydraulic tappet setup....as such here are no settings as to valve adjustment.
What specs are you looking for?

it be a bad ground connection to the bikes frame or a bad ignition switch

Your clutch plates have lasted 25 years. It is probably time to get some new plates. Have your dealer get you a set of Barnett clutch plates.