The other day my bike was running like a bag of old nails, so I cleaned the carbs and plugs put it back together and noticed the vacuum pipe to the tank wasnt connected when I removed the tank. My question is, if my bike was still running (Even though like a bag of nails) with no vacuum pipe connected does this mean my fuel tap is knackered? Cheers guys

Either the diaphragm is knackerd or it has the hrc mod which doesn't require the vacuum pipe to be connected.

When I bought the bike a few years ago I couldnt start it without the vacuum pipe connected so I guess I need a new fuel tap kit. Cheers