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 The previous version was outdated and no longer supported.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

250 Mag Jetting Specs

W

warburtonm

Husqvarna
A Class
Hey Guys: Can anyone get me in the jetting ballpark for a 250 Mag with a Circle F snail pipe and a Bing 54?

Thanks a million
Marc
 
First: Does the bike run? if so what problems are you having and at what throttle openings are they occurring at? (if not, I can tell you the original jetting that came stock on the bike if that's what you want.)
Second: Are you using the stock carb. and jetting? stock air filter? is the engine modified other then the pipe? what fuel/oil ratio are you using?
 
The carb is stock, with a 195 main, 35 pilot, 2.85 needle jet, and the clip is on the bottom groove (needle highest). Floats are set properly. No porting that I know of. 40:1 premix. The bike starts easily, then is sort of pig through 1/4 - 3/4 throttle. There is a definite hit in the power as it comes on the pipe, and then it runs kind of ragged. It feels as though there is more there. The plug appears dark, but I'm not sure I've done a proper plug test. I'm thinking I ought to drop the main (how much?), but what to do about the mid range?
Thanks Marc
 
That almost sounds like jetting for a non-reed valve engine except for the main jet. Right off the bat I see your needle jet is too small, and that would be most of your trouble in the 1/4-3/4 range. I do not have my Bing book at hand but should be more like a 3.14 or 3.16 needle jet. You have a #53 slide and a 401 needle right? Also check the float pivot pin for wear when you recheck the float level. Remember to do one change at a time when it comes to jetting. Let me find my Bing manual and we will see if we can get it spot on.
 
Opps, my mistake, They did not make the big carb changes until 75, so it would be a #1 slide and 281 needle. let me check to see what needle jets work with the 281 needle and get back to you, also did you check the needle for wear?
 
You must log in or register to reply here.
Back
Top