Search how to check for spark and timing
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Crank space full of fuel, mainly oil now as the petrol has been evaporating. I bet the first carby had the needle and seat leaking. Need to blow out crankcase (ah, crankcase not crank space) or ride around with spark plug out (rag over hole or you'll b wearing it). The proof will b on the rag.
Let us know how u go, it's important.
And DON'T run it without any form of exhaust pipe.