Simple guide to changing oil and filter

Remove any fairings or parts needed to get to oil filter and sump drainplug.
Find yourself a good container into which to drain your existing oil. I use an old oil bottle on its side with the side cut out (easy to pour into sealable container when finished and ready for disposal).
Find yourself an oil filter wrench. A good one I have found is very simple and effective. It basically consists of a length of webbing attached to a piece of square tubing that fits a standard socket ratchet. This is very suitable and infinitely adjustable to fit all sized oil filters. Get a good oil filter, ask at your local bike shop.
Remove the oil filler cap from the engine cover on the right hand side of the bike. Take the correct size wrench and loosen the sump plug (under the bike). Slide your waste oil container under the bike and remove the sump plug, allowing the waste oil to drain out.
I believe it is good practice to change the filter every time you change the oil. Locate the existing oil filter (varies depending on bike make and age).
Loosen it with the oil filter wrench, slide your waste oil container underneath and remove the old filter. As with the waste oil, the used filter should be discarded carefully. Wipe the surfaces with a clean rag and then wipe a small amount of oil on the rubber seal of the new filter. Carefully screw the new filter on to the fitting until it is hand tight. Do not over-tighten. An over tightened filter is in danger of having the rubber gasket distorted causing a leak.
Replace the sump plug securely. Take a funnel or oil filler pipe and fill with clean oil. The quantity required will depend on your particular model bike. My bike takes about 3.3 ltrs but the best bet is to fill it until the sight gauge shows about half full. Remember to have the bike vertical and level when checking the oil level.
Finally, run the bike until the engine is warm, leave for a few minutes for oil to resettle, recheck the oil level and if necessary, top up with clean oil.