After pondering and searching This forum... Other forums, And all over.... Basically the best 4 stroke in frame kit i can come up with, Is this one 50cc Complete Gas Powered Engine Kit (Honda) - $499.99 But, After doing some more research, I have also found that the stage three whopper gearbox has issues such as it not engaging and running severely hot also needing to be packed with excessive grease to work properly etc… And the hoot gear box is simply garbage… So, Is there any of you out there who have a couple thousand miles, And have an idea on which very reliable gearbox is out there? I'm trying to stay under the 500$ mark, and get a 99% reliable.. quiet 4 stroke to ride thousands of miles with, Is this reality with a 4 stroke and gearbox, Or am I going to need to buy a GEBE Kit? Thanks!