I got 2000 miles out of the OEM piston. I now have 1200 on the Wiseco Pro-lite, No Issues. Two of my 380 buddies put in Wiseco, a week after I did my top end. They do not ride as much as I do, but no issues with their bikes either! I must say the Wiseco revs a little quicker. It is noticably lighter. I'll be putting in another piston in September, before the race season resumes. I am going to try Vertex then. I think they are all good!