OK, I want to backtrack for a minute. It seams that you are not near the bike and your brother is looking after it for you. You should ask him where the fuel is coming from. If the lines are leaking, the leak would be up top.

If the needles are sticking, the fuel would run out the bowl overflow and down the overflow line and come out of the small line from under the bike. Your brother needs to get down under the bike and find the small lines just in front of the rear wheel and check if fuel is coming out of one of them. If fuel is in fact coming form one of the overflow lines, you can trace it back to the carb in question.

Its not a bad idea to replace old lines but that may not be the cause of the leaking fuel. You must first identify the problem.

 

Ok so I am now near the bike and apparently it fixed itself. My brother said he let it run for like 20 minutes idling and that’s when it leaked but when I turned it on, it fixed itself. I have taken a 1,000 mile trip and it runs perfect! No complaints. I have a few thread to do since I have changed the clip ons to Dan Moto clipons and I also added foam puppy grips too. It is such a comfortable ride now.

Thanks everyone

 

Sounds like you had needle not seating.

 

Dude just go to the local auto shop & as its no high pressure fuel injection hose, it will be cheep as , but i'm not sure about the fuel hose diameter( either 6mm or 8mm) on the old carb cbr's so just snip a bit of the old hose off & take it with you, & if it's the hose that's rotted out? as sure as the rest is in the same poor condition, so replace the lot while you have it all apart & save your self a lot of need less drama. C.Webb