need help with fuel lines

i have a 80 ltd 650 that i just got recently and the fuel lines from the tank were disconnected. lookin at the petcock theres 2 lines runnin from it a larger diameter line and a smaller diameter line. lookin at the carbs theres a line runnin from inbetween the middle carbs with a filter on it that i assume the larger diameter line hooks in to and theres 2 smaller lines runnin from 2 carbs i think the outer carbs but would have to check to make sure they was the ones. i think the 2 lines from the carbs t into the smaller diameter line from the petcock. is this how it goes i got a book but it dont really show how they hook up?

You have a brass tube coming off each intake runner, one should be capped off, one is hooked to the petcock to open the diaphram allowing the fuel to flow, and 2 of them are used for the pollution control system. Off the top of my head I think #1 and #4 are for the pollution control system, #2 goes to the petcock and #3 should be capped. I can check out one of my bikes in the morning to verify that this is correct.

rubbercity, Don't you think your bike year/model might be a bit significant? Edit your profile to add this info to a signature so that when you post, folks will have some context for answering.

There are both BS and VM Carb Connections links on our website showing pics of both type carbs for connecting them. Under "wg's Tech Stuff Index".

The large hose with the filter does indeed go to the larger fitting on the petcock.
The other two hoses you described are the float bowl vent hoses, and should route up over the airbox and around the air filter lid.
Do NOT cap these two smaller hoses off or connect them to anything else, or you stand the chance of preventing your float bowls from intaking fuel/venting properly.

The smaller hose that connects to the small fitting on the petcock should connect to a small brass fitting on the front, left side of carb #2.

thanks for the info fellas. ill let ya know how it goes.