Air Leak

I have used O rings to seal a lot of NT carbs.

When the motor is warmed up try full choking the carb
and see if it kills the motor fast.
If your intake still has an air leak your motor will run on and not die
easily.

Do not use cork as a gasket material for the intake to head gasket.
Just get some of that grey gasket material from an auto parts store.
 
Have you checked the jets? I would also check the float because if its stuck youl have these type of issues.
These symptoms also occure if your not running the hot plug B5HS.
 
I ordered a new spark plug to replace the crappy chinese one. How do you regap a spark plug? The float was fine... but the fuel line wasn't. It was gnarled and I cut it shorter and the engine runs even better now.
 
How do you regap a spark plug? .
Buy a spark plug gapping tool that is used to measure the gap
then bend the electrode to open or close the gap.

NGK B6HS is the best plug for these engines.

2
 
tap em against the cylinder to close, use ya teeth to widen ;)

0.5- 1 mm, whatever, its not that critical.

remember, cheap chinese crud. not italian ferrari.
 
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