He Nogyro, I've been running my G-62 hard since 1989 and It runs flawlessly to this day. I just replaced the jug and ring due to a mishap and I used an old spare piston and jug and it fired back to life and went right up to it's normal 7600 rpm. I know they're a little on the heavy side, but some of these guys should never ever bad mouth these Zenoahs, because when it comes to reliability they are #1 I also own a Brison 6.4, BME102, D&B 5.1, and all of them run excellent.