• 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     WR = 2st Enduro & CR = 2st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

250-500cc 09wr300 overheats

zilly

zilly

Husqvarna
AA Class
I just got back from a ride in the mts and my bike is totally overheating. Rode these trails lots of times never an issue. I am losing fluid out the overflow (I think) and there is no noticeable water in my transmission. Bke got extremely hot but I had to ride it out.

When I got home I had maybe a 1/4 cup of fluid!

I have recently changed the jetting a little but I was losing rad fluid before I did this.

I also replaced the top o ring and gasket on top of motor thinking that was the issue.

Could I just not be getting enough fluid in when I fill it-am I that stupid?

I have seen some stuff about burping the rad and thought I had done that. I'm just really at a loss here and would welcome any advice.

Also if you know what temps do your wr's run at?
 
Try a new cap. Also check to make sure that one of the radiators isn't damaged. My TE450 was overheating and boiling last summer because of a very small crack in one of the radiators. It wasn't losing much coolant through the crack, but the amount of pressure it lost caused the bike to overheat and boil very easily. I replaced the radiator and the problem went away.
 
The radiators have recently been repaired (bad wreck last year) so I hope that's not the issue.I am hoping its a cap issue or an air lock but not sure how to get that air lock out.

I do like the idea of going faster but I know how slow I am and I think I'm stuck with that speed.
 
I have an '09 250. I rarely loose coolant. Only when i'm creeping along while revving for prolonged periods which I try to avoid.

What are you using for coolant? I run straight distilled water + water wetter.

As far as burping I just fill them slightly above the fins then rock the bike gently from side to side and top it off. Then I go on a short ride and check it again.

My buddy also has an '09 who did have overheating problems when getting stuck on a rock or root or whatever. He got some of the oversized chinese rads on ebay and says they work better.
 
If your overheating problems started after having the rads repaired I would say your answer's there somewhere. For example, did the repairer blank the rads to stop dirt ingress and you have fitted a pipe unknowingly? or, has the repair itself caused a restriction. Otherwise, it sounds like you've checked the easy stuff so i would be looking at the pump itself.
 
I ordered a new cap last night. Really hoping that the cap I had on there was defective or not strong enough. Headed out of town for a few days but I will get busy when I get back and let everyone know what happens.

This bike never overheated until I switched out clutch perches and got the clutch adjustment wrong and the drag made it burp fluid at the 2012 golden spike (thats my theory anyways). Do the caps fatigue? I am wondering if once it burps fluid does that spring get weaker?

Anyways I broke my wrist pretty badly on my next ride and also mashed both radiators. I was able to ride again last winter but outside temps were cooler and winter riding where I live is desert riding so higher speeds and cooling issues were not so obvious.

Thanks for the help.
 
I tried earlier this spring to get the end cap off but was unsuccessful. Weird because the stock muffler on my cr125 was a piece of cake. I will look again at that.
 
Have the new stronger cap on and am going to run water wetter for my ride tomorrow. It's really hot here-100 in the valley so it will still be hot in the mts.

I did notice that I had a very small drip occasionally at the bottom of the right radiator where the hose attaches. I am wondering if that nipple is slightly out of round? I checked the hose and I can't see a crack in it.

Oh well, I'll see how it goes tomorrow.

By the way any of you that have temp sensors what is the operating range for your bikes?
 
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