I can tell you we had no trouble w the thing. I was really surprised how different from original it sounded when we first got it started. Admittedly, it had been some time since I'd heard it run, but it seemed to me that the sound was decidedly deeper and stronger. When I got it done I knew I should have listened to my heart and, midstream in the project, changed to more of a tracker style that would have been more senior friendly. I'm sure it didn't have more than four hours run time on the 378cc build. AND I bet that it's still in that stage. The woman I sold it to was more of a collector and took it home, parked it in a corner of her barn, and it's probably still sitting there. Pennsylvania has some very strict vehicle inspection regulations and I told her she wouldn't get it through their inspection; said she didn't care and bought it anyway.