• Husqvarna Motorcycles Made In Sweden - About 1988 and older

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 The previous version was outdated and no longer supported.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

1980 390 CR Piston - non standard?

VTF

VTF

Husqvarna
A Class
I have taken the cylinder off the 390 to inspect the wear. The piston has two rings and A83F2 stamped on the top. The cylinder doesn't appear too worn, so I was hoping to replace the rings. Can anyone help me identify the manufacturer of the piston so I can source the rings?

Cheers

Craig
 
If I am not mistaken 390's came with single ring Mahle pistons. At least my two did. Not sure what you have. There are several aftermarket pistons available.
I would recommend checking piston/cylinder clearances before replacing as you may be out of tolerances. If within tolerances, you will probably want to give
the cylinder a light honing to ensure piston ring seating before replacing rings. Also, even though the piston/cylinder clearances may be OK, check the ring gap
tolerances as well. There have been several occasions where I have had to go up one size on the piston ring and not just with Husqvarnas. You may need to do
a light grinding on the ring gap to ensure tolerances. But again, I don't believe 390's came with an oil ring.
 
All mine have a single ring (Wossner). I believe Wiseco pistons had 2 rings. I might be wrong !
 
Replacement out of production Wiseco pistons and rings can be sourced through LA Sleeve. As well as generic rings in the thickness and diameter you need even if your piston is not a Wiseco.
 
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