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Battery Vent Tube
- Thread starter pschuyler
- Start date
All the BMW's from that era had vented batteries, with vent hoses. Most of those sold thru the dealer were the brands were Varta or Marag. The dealer would fill them with acid. Most came with a little plastic elbow U pushed thru a small opening to break the seal. The hose ran down the side of the battery thru a small opening in the frame and just low enough to keep the acid fumes from corroding the frame. I've moved on to sealed batteries so I don't worry about filling and acid fumes.
bikerfish1100
New member
need for vent tube is based entirely and solely upon type of battery, and has nothing to do with type/model of bike (unless you're going for a Concourse restoration).
if you run a lead/acid battery that gets filled with water, you need a vent tube. if you run any version of a glass-mat or sealed battery, a vent tube is unnecessary (and likely does not even have option for placement).
if you run a lead/acid battery that gets filled with water, you need a vent tube. if you run any version of a glass-mat or sealed battery, a vent tube is unnecessary (and likely does not even have option for placement).
108625
New member
Most of the lead acid batteries for airheads are vented on the left side, and if you park the bike on the kickstand without a tube attached to the vent, acid can spill on your bike's frame and swing arm. As old as these bikes are, I'm sure a few of us have seen this happen, or evidence of it.
