• 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 The previous version was outdated and no longer supported.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!

All 2st Piston Diagnosis

ohmygewd

ohmygewd

Husqvarna
Pro Class
OK, the bike has had 100 odd hrs since it's full rebuild and after a compression test (158), l knew it's time for either rings or piston and rings but after opinions on the piston.
The cylinder is within spec as is the "A" Wossner piston but the ring gap and ring groove are out of spec but judging the blow by, should l replace piston.





 
100 hours is right about where my buddies 07 WR250 always needs piston and rings with the Wiesco. That is about 1200-1500 miles of our trails. His bike starts to feel weak at that point. He has about 6000 miles on it now, 4th or 5th piston, cylinder still looks great. Weisco piston and rings are about $150 so he does the whole thing each time.
 
I had a better looking piston but the rings where gone.

after measure all the dimentions the piston rod whas also out of spec.

asking the price for the piston rod together with the little bearing and piston rings, it came to a marginal cheaper price than a complete piston kit.
so in my opinion for the few $ more buy the whole new piston and put the old one in your trophy cabinet.

Robert-Jan
 
I just replaced my Wiseco piston and rings with about 100hrs on my 07WR250. I went with another Wiseco and I'm glad I did. That thing looks great and the cylinder is perfect. That thing sounds sweet. Starts easier and seems to run smoother too.
 
Just from looking at the pics and not measuring it looks like the ring groove is worn and rings only won't do the job. It appears the blow-by was caused by the rings rocking up and down in the groove and not being held square to the cylinder. Replace piston and rings.
 
Correct LD, l replaced the base gasket 6 months prior after a leak and l noticed a hint then but all good now!!

After doing the top end, l've forgotten how much torque the 360 has especially with Wallybean's airboot mod..KTMCRFKXFWRFRMZ450 whaaat :)
 
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