What petrol is best for cruising on Vulcans 600?

Various ideas in the link

https://www.google.com/search?q=1999+Holden+Jakaroo+petrol.+The+cruise+control+does+not+hold

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Hello Kiara, according to me if your monthly running is less that 1200kms that you should visit go for petrol while if you are running your Tata Tiago more than 1200kms that I will suggest you to go with Diesel one. Buying a petrol variant of this car will save the extra money as well as you can buy a top petrol variant which has the goods safety and interior features. The resale value of Tata Tiago is good in comparison to the Maruti and Hyundai.

Hi,one thing you can do,if you can still start the bike(maybe charge battery first)turn lights on rev bike if lights dimm or if thay dont get a bit brighter then its proberly the bike is not charging,there for it will just drain the battery untill the battery goses flate.
I hope this was some help,all the best.

What you are saying is the engine runs when there is a good supply of petrol by top feeding the carbs but not when fed from the tank.
That suggests the supply from the tank is restricted in some way.

You may have to define this a tad more. What do you mean loses power? Does the electrical flicker and the bike dies? What exactly is cruising speeds? If its in any gear, the RPM's will be different for each gear. Does it give good acceleration until say 8,000 rpm and then dies. Any wierd sounds associated with it? Did you happen to use corn-oil gas and your lines are dried out? Give all the information you can please so we can help you out the best way possible.