This is an old thread but it is the nearest I can find to my problem.
It takes ages to get the carb to flood, and when it does it floods (out the back of the carb ) before it comes up the tickler, plastic float, tickler just touches it so probably that accounts for some of the time taken but it really is slow, it's not the fuel lines as it is the same with a jury rig clear pipe and funnel.
Bike does start easy and runs fine if perhaps a tad rich (sooty plugs), I have a brass float, might swap and see what gives,
Anyone with similar experience ?