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 The previous version was outdated and no longer supported.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

81 430 Topend

J

jdaatwebco

Husqvarna
AA Class
I took the topend off my 81 430xc yesterday just to check things over before the new season starts. What is the recommended piston/cylinder clearence and the maximum ring end gap?

It looked really good to me. The piston clearence is .035 and the end gap is .020.
 
If you don't have the owners manual this site has one for an 1983 model in the reference section.
http://www.yourhusky.com/files/1983_Husqvarna_Owners_Manual.pdf
There are a few different things to check. Of course they are in metric measurements. Usually feeler guages have both etched into the blades. End gap 0.8mm and 0.3mm sticking the guage beside the piston skirt at the bottom of the cylinder but there are a few other things to measure as well. I guess the manual is for all two stroke models.
 
If your measurements are in inches, then your ring end gap is OK but your piston clearance is HUGE! Stock was about .004", and according to the manual .012" is max, and even that is pretty loose!
 
Piston/cylinder clearence is .0035 to a .004. I think that I'll just knock the glaze off with a light hone, and put in the new ring. The piston looks good.
 
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