@shazia Afzal
Your bike oilpump isn't working tht much good or ur crank connecting rod stops throwing oil after getting hot.... On very first basis check the oil pump if it needs a change then go for ATLAS HONDA CD-100 GENUINE OIL PUMP costing around 490rs buy it from a Genuine Atlas Honda Dealer, its bolt on fit + change the Oil pump Sprocket with its rod and bush too... Hope ur problem vl be resolved 