you need to put the filter on before you add the new oil
1 put your bike on the centerstand
2 start it up and let it run for a few minutes to warm up the oil. then turn it off
3 place an oil pan under the crankcase and remove the oil drain plug... go get a cup of coffee while it drains out.
4 remove the filter
5 open up a new can of oil and use your finger and coat the rubber seal on the new oil filter
6 screw the new filter on just hand tight. you dont need to crank it on there. just screw until its hand tight, then give it another half turn. if you overtighten it the filter can leak.
7 install the drain plug and tighten it securely.
8 remove the oil filler cap
9 add 3.5 litres of whatever oil you are using. (3L if you didnt change the filter)
10 screw in the oil fill cap securely
11 start the engine and let it idle for a bit. check for leaks (from the filter, from the drain plug)
your oil is now changed. go ride and have fun.