• 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     WR = 2st Enduro & CR = 2st Cross

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 The previous version was outdated and no longer supported.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

250-500cc Need help whit jetting (WR 250 Mikuni carb)

Lime

Lime

Husqvarna
A Class
My bike keeps fouling plugs every about every 3 hour :doh:

I am riding at sea level and it is Swedish summer so the temperature is about +20C. I am mostly running thigh singel tracks and I never get to use the 4 gear.

When I am at the MX track the bike foul plugs as often. So I guess it is the thigh singel track that keeps fouling my plugs. So what settings in the carburettor should I use?

I have a 390 main 30 low speed and the needle in the 3 clip and the air screw 1.5 out. Everything according to the manual.

So now I don't know what to do next?

Oh and a another ting. I spoke to a husky mechanic, he said that I should use 3% premix. I have tried to use 2.5% premix one time, the bike felt much happier whit that. Do I dare to use 2.5% premix whit out blowing the engine?
 
Lime;112549 said:
My bike keeps fouling plugs every about every 3 hour :doh:

I am riding at sea level and it is Swedish summer so the temperature is about +20C. I am mostly running thigh singel tracks and I never get to use the 4 gear.

When I am at the MX track the bike foul plugs as often. So I guess it is the thigh singel track that keeps fouling my plugs. So what settings in the carburettor should I use?

I have a 390 main 30 low speed and the needle in the 3 clip and the air screw 1.5 out. Everything according to the manual.

So now I don't know what to do next?

Oh and a another ting. I spoke to a husky mechanic, he said that I should use 3% premix. I have tried to use 2.5% premix one time, the bike felt much happier whit that. Do I dare to use 2.5% premix whit out blowing the engine?
Click to expand...

Modelyear?/Årsmodell?
 
The manual says a #4 but I'm pretty sure it's a #3 slide, that's what's was in mine. I have a friend with the same year and he has a 35 pilot, 400 main with no problems. I have a #4 slide and had a 30 pilot and 3rd clip on the needle with no problems either.
Right now I am running a JD jet kit with the blue needle 2nd from the top 390 main and my bike runs great at Sea level and up to 3000', I do start noticing a drop in bottom end power the higher I go. By the way I run stock gearing as well
 
Okej i think I found the problem.

The float level is wrong. I think...

I read at TT that if you tilt the carb 45 degrees the distances between the carb body and the top of the floater should be 20 mm (+ - 2 mm ) Can anybody confirm ore deny this.

If I measure mine I have 14 mm between the carb body and the floater.
 
I don't think it's the float level, i have had fuel leaking out of the overflow tube for some reason when it is not running and my bike still starts and didn't fowl a plug. I have had my float set too low and it would run out of fuel at WOT
 
14mm sounds about right. 18mm is the measurement for the older style tmx carb. If the needle closes when the seams on the float are parallel with the base of the carb, you should be close.
 
I have been busy whit a midde season big clean whit the bike, but I am going to take it fore a spin next week.

Mmmkay so I wont touch the floater level...

I am going to drop the needle a notch and turn out the airscrew 2 turns and use 2.5% in premix next time I ride.

Ore do anybody have a better idea?

PS I am gong to buy a new plugg cap next time I am at the bikestore.
 
An update:

I tried the things I said I would.

I have only ridden on the mx track so I cant evaluate how the bike behaves in tight single tracks yet. But the plug has no oil residues on it, and that is a god thing :)

By the way I have a 6DJ8-60 needle and a 3.0 slide. So what kind of needle do I have, does it make the mixture richer ore poorer?
 
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