Stator arrived in good order and in time for planned 5000 mile trip. Installed easily and delivered required voltage. 1500 miles into my planned trip, and about half way across North Dakota and it ceased to function. Had to be flat bedded 50 miles to nearest repair shop. Traded cycle in rather then wait for new parts and for dealer to find time in his schedule to install. I was 1500 miles from home. Still waiting for repair shop to send me stator in order to return for warranty claim.
I ordered one, when I got it, it didn't work right out of the box. MSS sent me a second one, It works , but I took it into my local Yamaha dealer. They tested it, Meets minimum standards for my bike. The OEM is above the minimum right out of the box, so I'm not sure how it's going to hold up. But it does cost about $100. less.
Time will tell.