Ninja 250 overheating

[mrblink]

I like your theory a lot better.  It's about 1/5 the price of a water pump!  I didn't know that the cap was so important.  Learn somethin new every day!

[JamesG]

I second the cap diagnosis.  Its should take ALONG time for the cap to release fluid into the overflow tank, and only when you've shut the bike off and fluid isn't being moved by the pump.

[mrblink]

I ordered a new radiator cap (25 bucks), and a new overflow tank cap and gasket, just for the hell of it (.75 each).  I'll let you know if it works!  Thanks again for all the great suggestions.  You guys rock.

[zoltan]

before ordering a cap, you might have wanted to have the old cap tested. almost any place can pressure test a radiator cap for you for a couple bucks.

[mrblink]

Too late.  I don't have time to get to the bike shop.  My parts will be delivered before then!  It was my $25 gamble.  I'm feeling lucky!

[mrblink]

I think it worked!  I refilled the radiator, installed the new cap, and all seemed well.  I did notice that the old cap was fitted with some sort of extra copper gasket that the new one did not have.  I looked on the parts diagram, and there is no copper gasket shown.  I think the dealer where we bought it did some jerry-rigging, and it finally failed.  The bike has always had a bit of radiator weirdness.  Dumb ass dealer.  Anyway, a big thanks to everyone for all their help!  It definitely saved my some time and money.  GS riders KICK ASS!

[Casimir]

I think it worked!

Cool!!  

Thanks for the update.

[zoltan]

word.