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 The previous version was outdated and no longer supported.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

main bearing re-boring

T

Tom Dowell

Husqvarna
A Class
I am in the process of restoring a 1972 250wr. split the engine cases and found a previous owner had installed one of the main bearings with copious amounts of red loctite. I have a small machine shop and am contemplating reboring the cases for liners and then reboring the liners for new, on size, main bearings. Anyone else been down this road and if so how did it turn out?
 
I just had this done by a friend/machinist. Worked very well. It's a different motor than yours, but the principle should be the same. We did it on an 80's 430 (magnesium cases) at the large bearings on both transmission shafts. That's the large one behind the clutch, and the output bearing at the C/S sprocket. The bores had lost their heat-fit and the bearings were loose and moving in the bores. Something to consider:

On those 430's, the main bearings are already steel sleeved from the factory. If yours are, perhaps you can remove the originals and start over. You'd still have to make your own new inserts but it might at least save you some time finding the original center to work from.

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Thanks for the reply. I am fortunate in the fact that one bearing bore is still good, so I plan on squaring the one case up using the dowels, assemble the other case on top, zero off the good bore, reach through and bore the bad bore to a cleanup. This should give me good locations for future operations when I separate the cases.
 
Picklito said:
I just had this done by a friend/machinist. Worked very well. It's a different motor than yours, but the principle should be the same. We did it on an 80's 430 (magnesium cases) at the large bearings on both transmission shafts. That's the large one behind the clutch, and the output bearing at the C/S sprocket. The bores had lost their heat-fit and the bearings were loose and moving in the bores. Something to consider:

On those 430's, the main bearings are already steel sleeved from the factory. If yours are, perhaps you can remove the originals and start over. You'd still have to make your own new inserts but it might at least save you some time finding the original center to work from.

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Husky should have done this from the beginning!
Marty
 
I was planning on turning press fit, 4140 steel liners for each side and then do a finish bore after installation.
 
I don't know the material 'my guy' used... that's why I need... "my guy!" But that's what he did. Finish bore in place. It's assembled, but not fired yet. Assembly was beautiful. Very good heat-fit, once again.
 
Picklito said:
I don't know the material 'my guy' used... that's why I need... "my guy!" But that's what he did. Finish bore in place. It's assembled, but not fired yet. Assembly was beautiful. Very good heat-fit, once again.
Click to expand...

That's what I wanted to hear!
 
So, he used aluminum for the new inserts, but remember it's for trans bearings, not mains. I don't know, but would expect, that we'd need to stick with a steel insert for the mains. At least, that's what Husky did.
 
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