2008 coure. Tuning done last month, carburettor packing changed, spark plug cleaning. There is no rpm meter, Yes it maybe low rpm. Will check if auto choke is off. No plug wires have not been checked. Your suggestions are right, I will follow up on them, auto choke and wiring. As battery is new, alternator is working well, tuning was done.
It's rhythmic vibration, it comes waves in gear and neutral, and starting in morning.