• 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 The previous version was outdated and no longer supported.

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    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!

jetting question

disonny

disonny

Husqvarna
AA Class
The bike is a 82 wr430. mikuni carb. Elevation is about 1100 ft. I was tuning the low speed jet and If I turn the air screw in all the way there is no change in the engine rpm. I have to turn the screw out about 2 turns to hear any rpm change. It has a 50 pilot jet. Would the jetting be too lean or rich?
 
too rich...IF you are having problems..50 is pretty damn big as these bikes are usually too rich down low stock.
 
What condition is the carb slide, if rpm starts rising at 2 and continues past 3 then your too rich on the pilot but you need the engine warm for a true reading.if the slide is worn it lets air past and gives a false reading making the mixture leaner than normal.
 
The slide looks good. The bike starts good too. I was just adjusting the air screw and the idle would go down after around 2 turns out. It wouldn't change going all the way in. The plug looked pretty clean too.
 
Sounds lean then, interesting way to test jetting on smellofdeath site by removing the main.try new pilot at 52+ might be partially blocked pilot.could not get my mikuni vm jetted correctly due to condition.binned mikuni which was at 60 pilot and still lean new keihin is now 40.if you have a spare bowl drain plug drill it and put in a clear hose as an easy way to check float level and empty bowl when changing jets.
 
Try a 45 pilot but you may have to go to a 40.

I have a hard time hearing the difference in rpm. I just purchased a hand held tach.

I found out I'm losing my hearing. I can't hear what everyone says. I hear online. Lol
 
Troy, The bike runs pretty good with the 50. With the 45 it bogs just off idle. It has some sort of aftermarket reed valve. No markings on the housing. The housing has a rough finish to it.
 
air leak???? your reed valve would almost have to be a Mossberger u sure nothings got crud in it i think you hafta have some really thick air like 50 degrees and waay below sea level to really need a pilot that big i bet thats close to as big as they get saw a 500 main jet once .... that was a big hole
 
It had an air leak from behind the flange with the crank seal behind the mag. It was running real lean from that. I fixed that. Not sure how long is was leaking as I was chasing jetting because of it running lean. The way I found it was the bike ran real bad at a CC I went to. When I got home it wouldn't start and it flooded. Gas ran from the mag cover and i found the loose screws on the flange. I think my main is a 440. I could try a different carb and see what happens.
 
The seal is new. It has a 440 main. The next smaller main I could find locally was a 400. That was too lean. The slide is a 2.0. I have a carb with a 2.5 slide. I've never tried changing slides. What difference would I notice with different slides?
 
50 is rich for sea level and even richer as you go up in altitude. 45 is stock and its rich with the stock 2.0 slide, if you are lean with a 45 you have some other issue, most likely another air leak.
 
Leak down test would be my recommendation although it is a lengthy tedious process stripping the bike and making up the kit.
 
So what is the best way to do a leak down test? I need to block the exhaust and intake? What is a test pressure to use?
 
REMEMBER YOUR LIKELY DEALING WITH 33+ YEAR OLD SEALS AND GASKETS MIGHT DO SOME EXPLORATORY SURGERY LOOK FOR NEARLY TOAST BEARING GEARS AND CLUTCH STUFF
 
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