Hoiw to change oil in my 83 yamaha xv 500 26R

SOURCE: how to change motor oil in 1996 yamaha xv virago 535

http://www.carlsalter.com/motorcycle-manuals.asp

free service manual there it'll tell you all you need to know

SOURCE: Oil change, no dip stick or niveu plug?

If you check here you will see that #18 is "gauge-level"
This should show you the oil level.
Remember: Put inside the 2/3 of the total amount of oil and run the engine for 5 minutes.Then kill it and add the rest of the oil to the proper level.

SOURCE: How do I check the oil level and add oil to an 83

look down low on the right side of the engine, their is a "sight glass" that you will be able to see the oil level, tilt the bike a bit and you can see the oil, leave the bike on the regular kick stand and if you can see the oil in the glass the level is fine, above that is the oil fill cap, that is where you put the oil, i think your bike holds 2500 cm of oil, that is about 2 and 2/3 quarts of oil. remember that motorcycle oil is different than regular car oil, this is a common mistake which also leads to the clutch plates sticking together after a bike sits a while.

SOURCE: Engine oil,- what kind is best?

That a loaded question ,it depends where you live ,In hot temperatures you need a thicker oil ,in cold climates a thinner oil .Best thing is to ask you local yam dealer .

SOURCE: Can you please help me about change theoli

In std form I suggest to change oil every 10.000 km (6750 miless) with a new oil filter on alternate cycle