your situation got 2 cases.
either spark plug, or carburator.
if change plug liao still cannot, then most prob is your carb out
of tune.
cannot be starter coil spoil, coz you say got sound, that means it
is working. since you say got sound, but like cannot burn the fuel,
means is the carburator liao loh.
i recommend you go eddy ong do. 
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press for NOS
--->> O <<---
