• 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 The previous version was outdated and no longer supported.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 WR300 smoking. Any ideas?

giantjoe

giantjoe

Husqvarna
AA Class
Hey, I was riding before winter and had a smoky time after some pretty hard hill climbing. It's white smoke from the exhaust. I figured immediately that it was the head gasket, so I bought them and replaced. There weren't any issues with the old ones upon inspection, but changed them anyway.

The next ride was okay, until I really started working the bike again, about 15 min into the ride. It was smoking the exact same way again. I decided to ride it a bit more, so I could get to an easy trail home, and the smoke disappeared while riding like a grandpa.

I was talking with my riding mates and trying to figure out the problem on the trail, so trying to exhaust all possible options I checked the crankcase oil. When I opened the drip screw, I heard a vacuum release!? Rode a bit further and the smoke was gone again. Then it started smoking again after hard work. This time i opened the oil fill cap (since it was more convenient) and I heard the vacuum release again. Once again the smoke was gone.

Soo... I kept riding, when it started smoking, I relieved the pressure and kept riding. Repeat until I covered 30km of single track. I assume at this point it something to do with the water pump. Are there gaskets in there that could be worn?
 
Make sure your crankcase vent is not clogged up. When a hot engine hits foot peg deep cold water it will rapidly cool the transmission and suck water and mud up the vent hose. If the vent hose is open it should never build pressure or vacuum.
 
The build up does suggest vent tube blocked, you may be OK with water pump seal, how milky is the oil does it smell of gas?

As the engine heats up oil expands so pressure forces oil into your cylinder causing smoke.
Now if while the seal being forced to ingress oil it may put gas into the bottom end.

Also metal condensates so if the water can't escape through the vent when the engines warm then it may turn oil milky.

Or your water pump seal has gone.
Does the water level need topping up after a ride?

Normally crank oil is a blue horrid smelling smoke.
Coolant is a sweet smell with lots and lots of white smoke.
 
whenever my bikes start smoking we go to the shed for that talk!
I could also recommend trying the patches, put those on the tank
don't waste you time with the gum,,,, motorcycles can't chew, but they can bite as we all know
 
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