Hi My motorcycle Hero Honda Dawn had problem at the time of starting a journey. The bike showing some Power missing alternatively . But it will solve after 10 minutes of ride, What is the problem Is it related to Petrol or Electrical problem

Try to burn your bike by pouring a litre of petrol, that will help

My bike is splender plus my problem back side sit under voltage capacity 3inchi ragistor descant. so what I should do????

Possible weak battery? its better after a run... when it's charged a bit off the alternator. it's possibly not holding the charge overnight and being a bit sluggish in the morning... have it checked - a half charged battery makes a half charged coil... zap? . which will spark but not quite so good as a fully charged coil ZAP!
also check the plug for oil fouling and check if the oil level is too high - if so drain the oil down to the Full mark - this can happen after a lot of failed starting attempts as unburned petrol gets past the cylinder into the sump, filling it up... If THIS has happened you need to change the oil and filter, oil full of petrol does not lubricate the engine!!! - I think its 10W30 for your bike, it takes about 2 pints.
Sounds like its almost definitely electrical tho...