I have 3 bikes being converted to HPN models at the moment so I have tons of parts that I could use to check with, a proses of elimination if you like.
Problem was that I did not start with the basics first, or shall I say not all the basics. I checked the carbs, throttle and choke cables, coil leads and wiring to the coil and the spark and spark plug gap. But one crucial element was the valve clearance or valve gap, this you have to check first - always - because the moment you started the motor you can't go back or else you have to wait a hour or two for the motor to cool down as the vale clearance can only be checked with the engine cooled down.
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