Most of them do it. I am temped to say they all do it , just a matter of degree. I suggest to wait for the factory to release the fix and get it installed at the dealer . Almost certain to be covered under warranty. I will be installing this fix whether or not it is covered under warranty.. Above all , do not worry about it , just drain the box every 200 miles . You can judge the amount that will accumulate by measuring with a graduated cup at the drain , and record the miles . Usually faster driving accumulates more oil , it does for me. As much as 1 ml of oil for every mile driven at high speeds (90 to 100 mph) steady . If I read the post correctly on the UK NOC , the fix involves putting the check valve black baffle box between the crank case vent and run this to the air box directly. Then they replace the rocker cover to eliminate the 2 breather hoses that run there now . It should really clean it up. Also , some of this has been covered by Richard-7 in the air box manual . Leave the bike on the side stand while draining , it helps the oil move over to the side where the drain outlet is. My Bike was delivered Dec. 2014 , and there is a 2015 bike on the forum that does this also .