• 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 The previous version was outdated and no longer supported.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 Dreaded bog observation...

D

dirt addict

Husqvarna
AA Class
I'm running my bike as a 144 right now. When I got it, as a 125, it had the dreaded bog off idle. I did some reading and went with the '04 rm125 needle. With some jetting changes it all but eliminated it. The bog was just a narrow sliver off idle and then would be gone.
A month ago I put a FMF Turbine Core II muffler on it. I needed a spark arrestor for one of the tracks I ride at. It's at 3400' asl. With this set up there was 0 bog. I rode it at a track 800' asl and with a minor airscrew adjustment it ran great. 0 bog.
The other day I swapped out the FMF for the oem muffler, hoping to get a little more oomph at the 800' asl track. The bog was back! Is it reasonable to assume the oem muffler is more restrictive than the FMF with a spark arrestor? The oem muffler is a "closed circuit course only" muffler.
The FMF muffler is going back on the bike for all of my riding...
 
I have only ridden my WR125 with the FMF spark arrestor on it, but I noticed that the bike bogged at the dealership when the mechanic was giving it a spin around the parking lot, and it had the stock open silencer on it at that time.
 
If the bog changes with exhaust, I would suspect that it is related to jetting.

I don't have any personal experience with the small bikes so I don't have any specific advice (sorry!), but I would suspect that the silencer flow differently and it's effecting the jetting.

The other possibility that I see is power valve, but that seems less likely for a silencer (more likely with a pipe).
 
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