My '09 is a burner, too. But I can buy a lot of oil for what a 685 kit costs.
I add a half-pint every 250 miles or so...that's a quart every 1,000. If I change the oil every 3,000, I have added an extra 2 quarts during that time. Assuming a 685 kit is $500 (I may be waaay off here), and if oil is $5 per quart, at my present concumption rate, I can buy enough oil for 150,000 miles before I've spent the same on oil as I would have spent on the kit. I'll never keep this bike that long.
$10/3,000=$.0033, and $500/$.0033=150,000
Of course, it is entirely possible that oil consumption will markedly increase over time, which changes not only the economics, but also the bike's performance.
So, I'm quite content to keep adding my half-pint every fill up. I don't carry extra oil, because most every place I have ever stopped for fuel also has 10W40 oil for sale as well.
Last edited by clogan; 10-03-2012 at 04:45 PM.