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 The previous version was outdated and no longer supported.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

Disaster With 390 Engine

M

Murph

Husqvarna
AA Class
Took part in my first Vintage Hare Scramble event yesterday at Ashby Motoparc here in the UK, a 3 hr event, split into two 1.5 hour sessions, and all was going really well for the first hour or so. The 390 was running perfectly and I was really enjoying the variety of the terrain on the 4.5 mile circuit.

Unfortunately on lap 7 I was on the fastest part of the course when there was a sudden loud crack and the engine locked up solid. Looking down I could that gearbox oil was pouring from the bottom of the engine!

After taking the clutch cover off it soon became clear what had happened. The nuts on the back of the clutch basket had worked themselves loose and at least one had dropped off with disastrous results. The clutch cover has a large crack and split but even worse, the left engine case has a large hole where the kickstart shaft inserts into the case. So the engine now needs a full rebuild with replacement cases and clutch, plus who knows what else we will find when it is fully taken down.:cry:

Oh well, that's racing as they say...:rolleyes:

It's even worse than I thought. The bottom end is completely solid. I think that one of the nuts from the back of the clutch has gone between the gear on the crank and the clutch primary gear and damaged probably the main bearing, which in turn has then failed and locked it up. The barrel and piston are fine, but the crank is solid, so I am not looking forward to stripping this one down to inspect the damage. Might need a crank as well. :banghead:
 
Sorry to hear about that. I bet you will own stock in Loctite when the new engine goes together. PM Huskydoggg about parts, I bet he can fix you up!
 
There is a set of 1980 390cc cases on " a popular internet auction site " right now . There are some other parts also but I don't remember seeing a crank .
 
That's a shame.
I hope my nice new basket does not go the same way. I have made sure it is loctited and torqued as per the manual. Lovely new hard anodised basket too.
Just had to put a new r/h end on my crank as well. The old one was 3 thou out of true (bent !)
 
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