I have one. The exhaust stud flange disintegrated when I tried to mount the exhaust pipe, the only way to fix was heliarc & machine a new surface...
Problems with customer service... finally got back to me today... I was told if I would ship them the cylinder at my cost,(12.00) they would send me a new one. Unfortunatly, I had ordered one from Zone8cycles last night... so much for customer service...
I will put the new cylinder on a brand new motor and finally, MAYBE get to go for a lil ride...
I have called thatsdax and will be ordering one of their American Assembled 69cc 2stroke Kits to replace a Brand New grubee g5 ... A little more expensive, but you get a real human to call about issues...BIG BONUS...