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 The previous version was outdated and no longer supported.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

125-200cc '12 CR125 Engine Speed Increasing

C

chestnut250

Husqvarna
C Class
So this is my first post to this board (which has been unbelievably helpful when I'm seeking information!) and after searching through the forums I haven't seen an answer to previously.

While on a trail ride this past Sunday my sons CR125 began having an odd issue. After a hill climb we stopped for a moment and his engine began revving to the moon with any throttle input. He shut it down and I went over to check things out. Inspected the throttle tube and cable, no binding, pinching, or stretching. Looked around the carb and nothing was out of the ordinary. Started the bike again and it started normally but then began creeping up in RPM on its own once again. We nursed the bike back to the truck since this signaled the end of our riding day.

Could this be a clogged or restricted jet causing the issue? This bike is stock other than an FMF spark arrested slip on, which hasn't caused any issue before. Any advice where I should start checking for problems?

Thanks in advance to anybody willing to post up suggestions as to where to begin looking for the cause of this issue!

-Dan
 
It could be a bit lean and is running on after getting a little hot on the climb. Or you could have some junk/water in your float bowl getting in the pilot or main and making it lean. Have you ran it since then? When and how often does it do this or only has done it once? Reed cage tight and well sealed? Carb clamps tight?
 
Tap on the float bowl when it happens to see if it's sticking closed. Usually it sticks open and gas flows out of the vent tubes... But, your saying it's idling fine, then revs when you roll the throttle, even a small turn?
 
Thanks for all the quick responses, guys! Motosportz, we haven't ran it since then but after it started doing that on the ride Sunday is continued. Every time you pulled in the clutch the motor would start revving. I will start it again tomorrow and see if it persists. I'll also check the reed cage bolts and intake boot clamps as well as tap the float bowl if it does it. Flyingbob, it doesn't idle fine. When you let off the throttle it just keeps climbing in RPM. Also, when you start it without touching the throttle it would start increasing RPM. I'll report back tomorrow with my findings. Thanks again, everyone!
 
It's lean, for some reason. air leak (crank seals, intake manifold/reeds) or a fuel issue (float height, clogged vent line(muddy?), clogged jet, debris on needle or slide(yikes)).

I noticed on my brand new WR125 that the vent lines on the carb were cut square. They should be cut on an angle to prevent mud buildup from blocking flow.
 
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