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 The previous version was outdated and no longer supported.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

Full Race 83 and 86 Engine Mods

G

Go_Navy

Husqvarna
B Class
I am building the bikes of my dreams to give it one last shot racing the vintage circuit. I have two bikes that I am building: 83 250CR and 86 250CR. I am hoping you guys can give me the hot tips for porting, carburation, and any other tricks to get my motors to be the best and fastest they can be.

I understand that you sacrifice durability and difficulty riding and starting with the best race mods. But since this is my last racing hurahh, I want to have engines that can help me win the series I am going to be riding (AHRMA). I am a very experianced rider and former pro-flat tracker.
I also understand that fastest is not always the bestest. Accordingly, your suggestions for a package that will get me the hole shot and coming out of corners are also appreciated.

What about blue printing and case porting?

Would you all help me with and suggestions and/or porting specs.

Thanks

Tim

tim27k@yahoo.com
 
Talk to Scooot on this site. He races a 83 CR250 and is very knowledgable. I think reducing the intake volume area would be a good place to start. Same intake as a 500 so the area is huge. I think this causes a slowing of the intake air post carb which isnt good, loss of atomization. My 80 CR250 ran harder than my 82 and main difference was the intake/reed. Just my 2c. I have some good carb mods that worked good on my 82 CR250, another gear of wheelie!
 
Will do on carb mods, I dont know anyone who is doing/done the intake mod.
Look in the tech reference and find the factory race mods for that year, they work pretty good.
 
Just for discussion sake would you consider sending the stuff out and paying $ ?
I havn't even spectated at one of those kind of events but can say a friend of mine has a son who worked at the honda shop and said some guys can spend the equivelant of a new gold wing per racing season doing moto x. You said last hurrah didn't you? My guess is the guys on cafe husky who would be most in a position to help you out don't spend a lot of time in this section and still spend lots of $ themselves and there is a point free advice gets tired over the internet.

I might also suggest starting with the exhaust system as theory in that area has most likely evolved and things are (most likely?) kind of wide open as to what you can do with respect to the rules and work back to the porting and carb. I have yet to do it but it seems the exhaust could come straight out for a good long distance angled enough to the side to miss the wheel and then return to the bike much more resembling a kart or quad or even a snowmobile system than your competition. Well on the earlier one, the water cooled one the exhaust spigot is real close to the wheel, closer than the jap stuff...agree or not? That is really the only improvement I have made to my 1988 430 hillclimber is to smooth that first abrupt turn and use another shape of pipe and matching silencer.

Later:
It seems that the 87/88 have a longer stoke and less bore closer to what is pretty much standard of a 72mm stroke with the modern stuff. I would think you would want to cap off the balancing holes in the crank if you were to get serious. I hear the old way was cork and shellac but don't see why just a thin sheet welded on the inside of the hole wouldn't pretty much do the trick.
 
Yes, I am most certainly expecting to pay for this work and advice. If anyone can point me in the right direction. I want to do this right.
 
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