talked to my dealer yesterday and Yamaha has changed the breather hose on the 2015. So that is why there has been no problems with them. The cost of the different hose is about $9. why couldn't Yamaha do a recall or at lest let the dealerships know about this problem. The 2015's were already out when I locked up the motor last year. Yamaha made my dealer order the entire engine part by part. Not once did they mention about the change in the 2015 breather hose. Now I have another blown motor. I would've been more than happy to pay the $9 for the hose. Not real happy with Yamaha but, hopefully they will step up and fix it. Only time will tell. If it wasn't for the people on this forum I wouldn't have ever figured it out. Thanks to everyone and I'll check back with the results.