Without being at your trike, I would make sure you have gas first to the carb. 2nd, you have to have gas at the carb when you open the throttle cable. If you have those, plus spark, then you should be running. Have you tried any ether shot into the carb to see if you have any combustion. Not alot mind you, but enough to check to see if everything is working right. If you have piston popping, then you will have to check through your carb.
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