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 The previous version was outdated and no longer supported.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

1979 CR 390 - Engine re-build

Bengt Husky

Bengt Husky

Husqvarna
AA Class
My good mate's 1979 CR 390 came to a grinding halt at Farleigh castle last year and I've been asked to strip her down to find out why ?

Basically the gearbox has sh1t itself....see pics, but I've found a few odd bits that I would like to share that I've not seen before. The piston has two rings for a start, but the main issue is the crank half shaft isn't a mail thread, which is what I was expecting to see. I've not looked at one of these for years and I'm not sure if the Motorplat hasn't been changed as well.

The old man is coming down at the weekend to give me a hand but I thought I'd ask the fellow Husky experts for their opinion.


Picture 009.jpg
 
Not seen this type of motoplat before...is this an update from the original ? Also not plane shaft end..?


Picture 005.jpg
 
one possible culprit for the gearbox crapping itself. The circlip holding gear 411 (6th) in place wasn't properly located allowing gear to lift.



Picture 010.jpg
 
Yes: i'd say your gear box sh1t itself. Someone probably snapped the mag side crank end off because they didn't know it has reverse threads. It looks like it was repaired with a female thread end, take the mag off completely & see if the repair was done professional repaired.
Nothing wrong as long as it's keyed correctly.

As far as a 2 ring piston, it's probably a Wiseco , good replacement, stock Husky ones are single ring, i've got a Wiseco in my 390CR .

Husky John
 
Its interesting how that c-clip came out of its groove. Those suckers are pretty stout and when they are in, its permanent.
It may be better to consider picking up a complete transmission. I scanned Ebay this morning and found this '81 250 CR transmission that someone is auctioning off. It has a blown 1st gear but Tritrophy in Oregon may have one on hand. Here is the link:
http://www.ebay.com/itm/1981-HUSQVA...Parts_Accessories&hash=item3f14755dbf&vxp=mtr
Husky transmissions are pretty interchangable with other models and years as long as they are six speed. In other words, the case holes are the same for the CR, WR, and OR. They changed the countershaft to more serrations in '81, but I'm pretty sure the entire transmission will fit into a '79 case.
 
ruwfo said:
Yes: i'd say your gear box sh1t itself. Someone probably snapped the mag side crank end off because they didn't know it has reverse threads. It looks like it was repaired with a female thread end, take the mag off completely & see if the repair was done professional repaired.
Nothing wrong as long as it's keyed correctly.

As far as a 2 ring piston, it's probably a Wiseco , good replacement, stock Husky ones are single ring, i've got a Wiseco in my 390CR .

Husky John
Click to expand...
Twin ring on my Wiseco too. Small W in an oval underside on wrist pin casting.
 
Wildebeest90210 said:
Twin ring on my Wiseco too. Small W in an oval underside on wrist pin casting.
Click to expand...

Thanks for the input chaps.

The piston issue is the last of my mates problems at the moment. However, the Wisco piston has a couple of quite big washer / spacers to pack out the small end of the conrod (if that makes sense)

With respect to the motoplat....the guy who did the mod, did a brilliant job of loctite (ing) it one...stuck like sh1t to a blanket. My only real issue is that he used a torx cap head screw with a washer to hold the mag on...? As a result the cap head screw and the mag have made a nice trepanning mark on the mag cover.

IMG_0614.JPG





IMG_0613.JPG
 
I'm seeing the piston being a minor issue at the moment. As for spacing washers either side of little end, I'm just having some made up in ally bronze for mine as we speak, needs 0.3mm min clearance. If you PM me the dimensions when you finally get back to the top end I'll m/c some up for you. Good luck with the rest !
 
Wildebeest90210 said:
I'm seeing the piston being a minor issue at the moment. As for spacing washers either side of little end, I'm just having some made up in ally bronze for mine as we speak, needs 0.3mm min clearance. If you PM me the dimensions when you finally get back to the top end I'll m/c some up for you. Good luck with the rest !
Click to expand...


Cheers for that mate....I don't need spacers, I was just questioning the use of them. Without measuring them I say they were a couple of mm each side ?
 
Bengt Husky said:
Cheers for that mate....I don't need spacers, I was just questioning the use of them. Without measuring them I say they were a couple of mm each side ?
Click to expand...
Probably will be that thick. Check the clearance on re-assembly. You probably know they control the float on the big end ? Worth checking when rebuilding, don't suppose you have checked big end/ crank/mains yet...?
 
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