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 The previous version was outdated and no longer supported.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

Husky CR390 crank interchange 1977-80

C

CR390_Kevin

Husqvarna
A Class
OK Husky 390 experts. I have a '78 CR390 with a bad crank.
In checking the parts books I noticed 77-79 have the same numbers for complete crank assembly and (of course) sub components. The 1980 crank has a different complete assembly number apparently due to a different right side (ignition) shaft as shown in listing below.

Does anyone know if the difference in the 1980 crank means it cannot be used in the '78?

Here are the numbers from the parts books.

1977
Crank Assemb 1611599-01
Right shaft only 1610868-01
Left shaft only 1611543-01
Rod kit 1610642-01

1978
Crank Assemb 1611599-01
Right shaft only 1610868-01
Left shaft only 1611543-01
Rod kit 1610642-01

1979
Crank Assemb 1611599-01
Right shaft only 1610868-01
Left shaft only 1611543-01
Rod kit 1610642-01

1980
Crank Assemb 1611599-02 (different)
Right shaft only 1611815-01 (different)
Left shaft only 1611543-01
Rod kit ? part number not listed

Are these cranks difficult to press apart? I did some japanese cranks years OK and those went fine. Maico cranks were much tougher to press apart. Where do the Huskys fall?

These cranks are not full circle either so seem more difficult to support in the press.

All comments appreciated!

Kevin
 
kev why is the crank "bad" ? ....grouty certainly covers all the right ground regarding different offsets, strange really as so many hva parts of that era were interchangeable .My 78 390 had a sort of grumbling vibration after 2 years hard racing !which i put down to a worn big end bearing , when i asked the uk importer Brian Leask motorcycles for a new one they said it came as a kit complete with new conrod and i think a new big end pin. Anyway i got the crank split and new pressed in by the late ray snoad , well known tuner in the south of england who used to work on graham noyce's works maicos! when i collected it from him he said he used his most powerfull hand operated fly press! he then realigned using a v block , vernier and taping hammer.I Put the crankshaft back in using genuine hva factory tools an it ran as sweet as a nut thereafter.
 
hvaloz2 said:
kev why is the crank "bad" ? ....grouty certainly covers all the right ground regarding different offsets, strange really as so many hva parts of that era were interchangeable .My 78 390 had a sort of grumbling vibration after 2 years hard racing !which i put down to a worn big end bearing , when i asked the uk importer Brian Leask motorcycles for a new one they said it came as a kit complete with new conrod and i think a new big end pin. Anyway i got the crank split and new pressed in by the late ray snoad , well known tuner in the south of england who used to work on graham noyce's works maicos! when i collected it from him he said he used his most powerfull hand operated fly press! he then realigned using a v block , vernier and taping hammer.I Put the crankshaft back in using genuine hva factory tools an it ran as sweet as a nut thereafter.
Click to expand...

Hi hvaloz2,

Thanks for the reply and tips!

I bought this bike just recently. I knew the motor was locked up but did not know why until I pulled the top end off. The piston and bore look pretty fresh but the crank lower rod bearing is stiff as are the main bearings.

The crankcase looked like it got water in it at one time, like it had gone through a creek and not flushed out!

I hope to split the cases this weekend if my mag puller gets here in time.

I am not sure what you mean by "his most powerfull hand operated fly press". We used to use a press with a hydraulic jack in it. My father made it in the '70s from channel steel (car fram I think). The jack pushed against a motorcycle fork tube set in place by a couple of large bronze bushings he turned on a lathe. Wish I had it now!

I do have a lathe and dial indicators and perhaps I will go for a press from the tool catalogs you see these days. It would be nice to do my own cranks again.


But that can wait for another day as I just found a used crank at a reasonable price that I am having shipped to me.

I am planning to replace the bearings and seals while I have it apart and will take a close look at the gear set.

The rest of the bike is in decent shape. I will probably need shocks at some point but would like to sort the motor out first.

Here is a photo from a couple of days ago.
IMG_0355-L.jpg


I have a couple of YZ465's keeping me busy too.

Here is one of the 465's I finished up last year.

IMG_1935-L.jpg



The Husqvarna is an interesting bike and I will enjoy tinkering with it. And I really like that aluminum tank!

I am sure to have more questions... thanks again for the help!
Kevin
 
You must log in or register to reply here.
Back
Top