i changed the oil in my 250r a couple weeks back… you only need to change the orings every 2-5 oil changes (the drain plug washer needs to be replaced @ every change, but the orings don’t really break…)
it took longer for me to do it because my rear swingarm stand hadn’t arrived yet… i was talking to the service guys… they suggested to switch to synth @ 5k miles… i got the kawi oil and filter for 20 bucks… figure it was good enough..
whenever you work on bike/car you can use latex gloves… no more having to deal with orange to get grease/oil off the hands… i also found that the oil tends to drip around one side of the plug, so you can unscrew it by making slow motions from the other side and stay clean… it took me a while on my car to get the drain plug off without getting dirty and being able to catch it before it hits the pan…
i also took out the oil screen because I heard it could be pretty gummed up for the first few changes… it was pretty clear… be careful with the 5 small screws though, they are very easy to thread…
second thing about threading… there are 2 drain plugs on the 250r,,, one is directly attached to the crank case… and the other is attached to the oil screen assembly… use th drain plug that is attached to the oil screen… if you strip this plug, you only need to replace the oil screen assembly instead of your entire crank case (i.e., engine)
i’ll post some pics next time I do it…