When I first got my 250R I changed the oil at 50 miles.
I used Valvoline 10w-40 motorcycle oil and a WIX #24941 filter.
http://valvoline.com/products/consum...cle-atv-oil/13
Using the same brand oil and filter, I changed the oil again at 100 miles, 300 miles, 600 miles, and 1000 miles.
At 1500 miles I changed to Shell Rotella T Synthetic 5w-40 and I still used the WIX filter.
http://www.shell.com/home/Framework?...t6_detail.html
I have spent countless hours studying up on mototcycle oil. I was so skeptical about using diesel truck oil at first. After I spent some time looking in to it, the choice was very clear. Shell Rotella T all the way !!
They actually have their own Shell Rotella T motorcycle forum. Check it out.
http://www.shellusserver.com/ubbthre...Board=9&page=1