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 The previous version was outdated and no longer supported.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

Decompression button location

dartyppyt

dartyppyt

Husqvarna
Pro Class
Guys,

Dropping my cylinders off tomorrow at Hall's, for boring and new pistons and rings.

On 390, 500 and 430, I have decompression buttons on hand.

Where is the best placement for these in the cylinder liners. In other words how far down from top of liner?

I'm going at an angle, carb/kicker side between the stud holes and regular head bolt location.

Looks like there is plenty of meat in almunium outside of liner for them.

Thanx
 

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The hole on my Maicos which come stock with the decomp valve in the cylinder are close to the top, I did not measure them but I'd guess no more than 1" from the top.
 
I just ordered a counter bore so I can drill a hole for the pilot and use a extended pilot to bore into the fins and make a flat spot on the surface then drill and tap it for the decompression valve. Next I need to purchased a radial arm drill press to do the machining. I figure for $300 and I have so many compression valves to install it will pay for itself. I just purchased a nice craftsman drill press with a work table that angles for $239 / with free shipping can’t beat that with a stick.

Do you use the spark plug threaded adapter that has the 10mm threaded hole for the compression release or do you tap the 10mm hole in the cylinder or head.?

I notice the 500 in the pic uses the 10mm-1 threaded compression release in the cylinder. There is a heli coil kit for the 10mm-1 thread if we get into trouble should the threads pop out. Good to have a backup plan.
 
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