Re: New engine trouble 66 cc.
Fuel, compression, spark at the right time, air, correct timing and it will run.
Make sure you're getting fuel to carb, make sure you have spark, make sure intake gasket and head gasket are tightened corectly and sealed off.
plenty of info on here to be found using search feature on how to test for all these things.
bes5 wishes and hope you get it going.
PS: forget about mods to anything and concentrate on just getting an 3ngine running and tuned properly, otherwise you'll likely just be working against yourself since you dont have the basics down yet.
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!