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 The previous version was outdated and no longer supported.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

78 Or390 Carb Question - Float Arms

T

TexanF250

Husqvarna
First time posting on the site. I purchased this OR390 a couple of years ago in decent shape. It can be made to run and when it runs, it runs pretty well but it is a @#$% to get started. Hence I haven't been able to ride it much. I've now decided to get this resolved once and for all.

The carb is a 38mm Mikuni VM. I've cleaned it thoroughly. All jets are and passageways are spotless. The only problem I encountered was removing the Air Jet. Someone had buggered up the screwdriver slot so it presented a significant challenge to get out but I did.

My question is this:

I do not know which direction the float arms are supposed to go. A photo in the Husqvarna Service Manual shows it arms up. There is another diagram that shows it going arms down. The diagram in the parts manual also show it oriented arms down as does every Mikuni drawing I can find. I do not know which is correct. I have it installed arms up as shown in the service manual photograph.

I figured that setting the float to the correct height would make it clear which way is correct but it really doesn't.

Any help would be very much appreciated.

Thanks in advance.20200608_205318.jpg20200608_205353.jpg20200608_205353.jpg20200608_205353.jpg
 
I’m not too much of a help here ... but there’s some drawings on this site www.frankmxparts.com Frank would most likely have the answer .... he has helped me lots on my Keihin ... but he does know the Mikuni as well.
 
Thank you very much for the reply. That is how I installed them but I wanted confirmation from someone who with knowledge. I really appreciate it.

As a note to anyone looking at this in the future with the same question, the arms are actually "arms up" as the carb is shown upside down in the top photo. While the arms are "Arms down in the photo, they would be upward when the carb is installed on the bike.
 
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