How to replace thermostat on 1980 honda cx 500 silverwing motercycle

Honda temperature gauges tend to run high before the electric fans kick in. They also tend to read differently on different bikes of the same model (fuel gauge, temp gauge , speedometer, etc.)Your fan is driven attached directly to your cam so it spins constantly. If your machine is not actually overheating or boiling over and has plenty of anti freeze, I would just keep an eye on it and not worry about it. If your engine gets really hot it will tend to leak anti freeze down the left rear cover past the water pump seal. This is normal and should be of little concern unless the water pump develops a steady drip. Then the water pump seal is bad and will need to be replaced.

Takes special equipment to test the CDI ... does your bike start? run? if not ... there is that possibility that who ever told you it is bad is correct.

tighten them all the way up or the clutch will slip

sounds like to be a faulty oil pressure switch, replace the switch and try.

The Honda Rider Club offers free membership which includes access to a generic service manual ... a paid membership gets you access to the service manual for your model according to info at the site. http://hrca.honda.com/

from the honda service manual head torque kg-m 5.0 - 5.5
ft-lb 36 - 40

relay is bad or connection is--chec battery cable titeness or starter button--if u hav a kik starter buy a batt eliminator capacitor n hook in place of battery and bike will run like the old days

Perhaps you got one of the new Honda 1980 Tech where they are using a Turbo to gain HP(Kw). It is a white elephant but a technology experiment. Bike too heavy for turbo, not very agile. Google CX500 and read it's review in NZ Bikers magazine 2010 March edition.

Check valve clearances. Also, try a new spark plug in the weak cylinder. Check points setting and condition.