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 The previous version was outdated and no longer supported.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

Jetting for Colder Weather - 2 stroke

M

mikebru

Husqvarna
AA Class
I'd like to get my bike ready for colder weather riding.

There are a few dual sports here in NJ last week of Oct and 1st weekend of November. Also, a mid-Oct ride in Pa.

I assume coldest temps would be in mid 40's in the morning but warming up.

Any need to change my jetting on 2009 WR250 with Keihin carb?

Main jet 175

Pilot jet 42

Slide 7

Needle has red top, think its JD needle.

Clip is in the 2nd from top slot which is the 4th up from the bottom most position.

Is the cold I described cold enough to change anything?

I read to lower clip (raise needle) to richen fuel and maybe go bigger on pilot and main.

If I need to change jets, do I just order individual from JD or somewhere else?

The Pa ride will be at much higher altitude than I usually ride. NJ rides are how I usually ride. Bike runs well now at low elevations, warm weather.

Thanks
Mike
 
I'd like to buy a Motosportz Lectron but can't spend the dough now.

My carb seems to be set up great now. Starts 1st kick with the cooler weather.

I'm going to the Hammer Run dual sport ride this Sunday. It's supposed to be in the low to mid 30's in the morning. I'm concerned the bike may not run great in the cold. This will be my first cold weather riding with new to me bike.

I think i've read almost all there is to read about carbs and jetting. I have no spare jets to change out, though.

So, I read that since cold air is more dense than warm air the bike will be leaned out in cold weather since more oxygen molecules will be stuffed into the same volume of air entering the carb.

My question is this -to compensate for more air, and without different jets to change, should I turn the air screw in to allow less air into the carb, thereby 'evening out' the mix? If I don't adjust the air screw then the bike would be lean which would hurt performance and is dangerous to the engine, correct?

Maybe I'm worrying about nothing, though. I'm a pretty slow rider so maybe I won't even feel any difference with the weather.

What do you guys think?
 
screw it in mite raise the needle a notch[ lower the clip] it seems odd to me the tmxx on my CR144 doesn't seem to mind cooler temps some guys hafta rejet when the wind blows
 
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