03 Honda shadow 1100 carb vacuum

• vacuum
• Carb tuning
• '00 Shadow Spirit 1100
• Carb tune

• SD

  Seth Delfunt New Member

  10/15/26, 11:35 AM

  Hello, I have a 2003 Honda shadow spirit VT 1100, and I recently purchased a full performance upgrade kit for it, full carb rebuild kit, velocity stacks, new plugs and wires, new ignition coils, new exhaust. Most of those items were bought from TJ Brutal Customs, my question is do I need to reuse all of the vacuum Lines that were plugged into the carb. Off the top of my head, I think there was a hose coming from each car that connects to some kind of atmospheric Vent, another one was supposed to capture some fumes for something. Anyway, the whole bike's apart right now, so it's kind of the time to figure out whether those items are needed for peak performance or not. Thank you. 

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  TJ Admin Staff member

  10/22/26, 4:03 PM

  @Seth Delfunt you only need to have the bowl vents open and the slide vents open, i prefer putting a lnegth of hose on them and running them to the gaping hole in the frame right at the back of the tank. 

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