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 The previous version was outdated and no longer supported.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

Carb size

I had the Bing and switched to the Mikuni. What I didn't like about the Bing was the fit of the carb to the cylinder is a metal to metal fit. I found that over the years that the spigot on the cylinder side was no longer round. Thus, the male end coming out off the Husky cylinder was no longer round. The Mikuni conversion has no metal to metal fitment. That being said, I went with the 36 mm. I suggest if you go with the Mikuni, you take it to a machine shop and have them groove the back spigot for a pair of "O" rings. for a seal on the back side. I got my Mikuni from Huskyjunk.com. It comes with everything. But the fit where the spigot goes into the air bell, it comes with a large rubberband to seal it off. The rubberband is a section of mountain bike innertube, not kidding. Also the band breaks down after about 6 months. Groove it and "O" ring it with fuel and oil safe quality parts and you will be happy. I can't tell you about the 38mm because I never tried it. With the Mikuni I have found ...starts easier hot or cold. Doesn't pee all over your boots, floor and dog, (no tickling). I can't tell it runs any better or worse. I ride it in the woods. Mikuni parts are cheaper. Pain to jet as you are starting over, where as if you put a Bing back on, you know the jetting. All that being said, I am happy with the Mikuni and would do it again. I strongly suggest you replace your ignition. It is hard to jet an engine if your ignition is poor.
 
I think I have a 38 that I can use. I'll have to check the carb to boot fit. I have a power dynamo ignition to use. I just got a piston and rod kit last night. Once the bore and crank are done hopefully I can get rolling on the motor.
 
I have a 38mm Mikuni on my '76 250WR and it is perfect, starts easy, tons of low end, smooth transition to the strong mid range and screams on top. The o-rings are the ideal way to seal the carb to the airbox but you can also cut a strip of inner tube to seal between the carb bell and the airbox.
 
disonny said:
I think I have a 38 that I can use. I'll have to check the carb to boot fit. I have a power dynamo ignition to use. I just got a piston and rod kit last night. Once the bore and crank are done hopefully I can get rolling on the motor.
Click to expand...

If you need an airbox to carb boot for 38MM Mikuni you can use a Fernco rubber fitting Part #1059-22 with a little bit of trimming.
 

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Do you have a picture of how that Fernco piece fits? The 75 WR uses the same air bell as the 74 250 Mag.
 
Jeff B said:
Do you have a picture of how that Fernco piece fits? The 75 WR uses the same air bell as the 74 250 Mag.
Click to expand...
Sorry I don't. I thought the 75 used the same air box as the 76-78 maybe I was looking at an 75 CR I would measure the diameter on both the carb and air box and see if they are close. The fernco is cheap enough to experiment with.
 
Mine has the air bell like the older bikes. I am waiting on motor parts but I tried the air bell on the carb. If I could find a rubber bushing like they used originally I think it would work. If I can't then it looks like I'm cutting up a HD tube.
 
My cousin's Mag just has a section of inner tube on the carb and then stuffed into the airbox, it seals great. I also set up my brother in law's '76 175 that way.
 
I would love to find a rubber bushing, however I haven't found one yet. If you don't wish to cut on a carb....(groove it), I found that a thick innertube is tough to get in place. Mountain bike inner tube worked for me. Mock up the carb onto the motor without the rubber band. Mark where you wish the mounted carb to be in the air bell. . Allow some room to remove the slide. Cut a rubber band out of your tube, wrap it around the back of the carb. Force it together. I t will be very tight. Also, the back of your Mikuni is too long. It cramps up the space for the air bell to mount. You might have to shorten that a bit... When everything is about right, tighten bolts to the airbell so it does not rub on the frame. The rubber band works very well...I haven't grooved my carb yet, But....after a 6 to 8 month inspection, I have found that the inner tube breaks down and needs to be replaced. Yes...one tube is a life time supply of rubber bands. I think the oil I lube my filter with is at fault. I use Maxima filter oil.
 
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