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coolant overflow tank ????????
JUSTGO's Avatar
Posts: 1,474
Join Date: December 17, 2003
Location: Reston
coolant overflow tank ???????? - May 29, 2008, 08:49 AM

I have an 03 gsxr 1000 that I am turning into a street fighter. It has a huge coolant overflow tank. I am looking to find a smaller one and relocate it. So I have a few questions has anyone else done this? Does anyone have a smaller tank that they would sell or know of a good place that I could find one? I wish there was a salvage yard for bikes so I could walk around and find one that works for me.

Has anyone eliminated it all together? I have never seen a difference in the amount of fluid in the tank so I was thinking I might be able to get rid of it all together. Dirt bikes don't need them but are not affected by dumping of coolant. It has tube that dumps into the tank and one from the bottom from the tank to the radiator. Does it need to pull from the reservoir?

Favorite thing on my bike: the miles I put on it
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Join Date: June 11, 2003
May 29, 2008, 08:54 AM

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Posts: 2,237
Join Date: May 28, 2008
Location: Frederick, MD.
May 29, 2008, 10:36 AM

I am about to remove the overflow tank on my ZZR, I'm sick of the damn thing leaking ever since I replaced it.

Ok maybe that's a bit drastic, but I sure want to. I would also have to find something to do with it if I convert to a street fighter.
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Join Date: October 31, 2007
Location: Ashburn, VA
May 31, 2008, 05:47 PM

When you ride and the engine heats up, the coolent expands. The overflow collects it. When you stop, the coolent contracts and the excess coolent is sucked back into the engine, and radiator. If you remove the reservoir, the expansion will piss away the fluid, and when you stop and cool, it will suck air into the cooling system. The next time you run, you'll tend to run hot and possibly damage the engine. The best bet is to find either a smaller reservoir (but not too small...it has to handle the volume) or relocate the overflow someplace else (with the same tank or some other kind of container that will handle the heat and volume. As long as the overflow hose stays in the fluid and doesn't get exposed to air (allowing air into the colling system), you'll be fine. Craig's was relocated to a spot in front of the right clip-on, but its a race bike without headlights and stuff and may have more room that a street bike is this location. The coolant is the left hand bottle (as you look at this picture). The smaller bottle is the fuel vent overflow.
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