1) I have attached the picture of my spark plug for mileage aspect.
2) I am using 10w30 Hero engine oil
3) Tik tik noise in the head of my Xtreme on idling. What can be the problem and how can I fix it?
4) Rpm fluctuates at idle.
5) How many kms can the go after closing the fuel valve? Mine goes around 1.1 km.



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