my mates got a 2002 piaggio zip when hes riding along and puts either indicator on the flash really iregulary and dont flash at constant speeds also when he puts his brake light on it flickers and goes on and off the same is with the horn aswell, when hes riding and beeps ir, it goes soft and loud but usualy when he is stationary all of these things work fine any help ??
My PX Vespa did this, it was an earth off at the flasher. Different setup, but it might give you a pointer.
Holy Shit bad memories of my typhoon have come to haunt me. Im guessing this is a common problem on piaggio's now. XD Well from my experience (i didnt fix it btw) try the battery considering it only happens when the bike is running it sounds like the battery is dead mate. Get your mates battery in, take it for a spin and see if it does the same.