or cut the chain down so that you could adjust the rear wheel for the drive chain and use the tensioner on the pedal chain. It is the only thing that worked for me.

My gas tank only leaks when I over fill the tank or tilt the bike to the side drastically... The air leak on the intake manifold is the number one problem with these engines I think. O rings and or sealant seems to help.

The bigger issue is these are the typical break in problems. Once they are fixed if you keep a check on them the bike should do well for you I think

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visit my blog for Riding in the hood,... The home brew bike journal....http://frictiondrivebicycles.blogspot.com/ The deacon's fiction