Coolant leaking from the "weep" hole indicates that the seals are out on the water pump. That's actually what the hole is for, to monitor the condition of the water pump seals. Pretty simple fix with the factory repair manual. Replace the impeller shaft and bearings along with the seals while your in there. Good luck!
SOURCE: Kawasaki KX250F 2006 model coolent leak
There are two seals on the impeller pump. Replace the seals an the leak is stopped. Put in a new cover gasket as well.
Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx Click on the "ENGINE COVERS" tab.
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SOURCE: Yamaha WR250F Leaking coolant
yes thats the weep hole it leaks when your water pump iner seal starts going bad,
It means your water pump seal is seeping at this point. Eminent failureportended. Replace water pump. Seals on pumps usually fail because of bearing wear, so this is a precursor to pump shaft failure. Good luck
SOURCE: 2001 Honda CR 125 motorcycle is leaking coolant
The hole that your coolant is leaking from is a vent hole. Its purpose is mainly to give the airspace behind the water pump a place to expand into the atmosphere, and a place for the coolant to escape when the water pump seal goes bad. Every vehicle I can think of, if it has a water pump, its got a vent hole. So, what you are faced with is replacing the water pump with a new one (seals and individual parts are not available for the water pump on your Honda).
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