Hey again, bad news again. I was dismounting my engine to replace the hardware earlier because of a broken bolt, and in the process noticed something horrible, a piece of metal that had broken through the gearbox of my happy time 2 stroke. I proceeded to open up the right side of the engine to find a few broken teeth had broken off the larger cog and punctured the engine casing. The bike has been running, but not quite as well as Jon's, whom I built the bikes with. I'm guessing this is the cause. The cogs do not seem to be that heavily greased, should they be? There is a collection of metal shavings and grease near the hole in the box. We bought the engines off of Boygofast, but not through ebay so that we could get a better deal on two of them. I have sent an earlier email about a replacement chain and he didn't reply, so I doubt he'll do anything about this. I'm including pics so you guys understand what's going on. If you have ANY input that would be awesome. We couldn't have built these bikes without you all and I can't repair it without you. Thanks