• 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 The previous version was outdated and no longer supported.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 Can we use A2-70 stainless bolts for cylinder head ?

Hurky

Hurky

Husqvarna
AA Class
Hi all,
I was searching about this and did not find anything really....

My WR300 has six M8 bolts in the cylinder head, OEM are pretty expensive so I went for some 12.9 hardened stell bolts but those are only available in a black finish that is sensible to stain / rust so I painted them black to prevent that.

My question is, would stainless A2-70 bolts hold up ? I think they would but I like to get confirmation from someone who knows better.... AFAIK A2-70 have a similar tenside strengh than steel 8.8 bolts, is that enaugh for a cylinder head ?


Regards.
 
Well i would choose mild over stainless just because ive heard stainless work hardens, but once its torqued up the bolts are just under tension.
Never had an issue with my head bolts tho.

Perhaps a more technical guru will be along to put me in my place. (Hope so i like knowing why to do things)
 
juicypips said:
Well i would choose mild over stainless just because ive heard stainless work hardens, but once its torqued up the bolts are just under tension.
Never had an issue with my head bolts tho.

Perhaps a more technical guru will be along to put me in my place. (Hope so i like knowing why to do things)
Click to expand...

Yes, not a good idea from what I know. It hardens and get brittle. Again, I'm not a metallurgist but I have always been advised against it.
 
Thanks all,
AFAIK A2-70 have a tensile strength similar to Steel 8.8, but I'm not sure on the brittle issue you are commenting ...

Regards.
 
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