1.5 Year Project Running, but not Moving Under its own Power

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Check to make sure your exhaust is not partially plugged. I've seen mufflers and Catalytic Converters (no CC on a 600) collapse internally. I've also seen where mice and birds have packed the exhaust, of extended parked vehicles, with nesting material and/or nuts. There might even be a problem within the Honda's heater box. You do need some back pressure but too much will cause you problems. Disconnect the exhaust at a convenient location, run a short piece of exhaust flex pipe for safety and try a short test drive. If it is an exhaust problem, there will be an immediate impact. There should be no doubt within 5 minutes.
Hello 2cylinerhanda Fans,
I am in need of your help. I have been
working on my 1971 Honda AN600 for 1.5 years, I have
completely rebuilt the engine and it is now running and
idling, but completely dies when its under load. I assume
its a fuel, spark or timing issue, but wanted you expert
opinion.
Please note the following: The wheels spin�(or
wheel because of differential)�when put in gear and vehicle is
off the ground. Vehicle starts much better when vacuum
advance is heavily advanced. Vehicle starts and ideals very
nice. It rev's up fine, but when clutch is let out
vehicle starts move but dies immediately.
Thank you so much for your help,Sam
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