• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st 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 The previous version was outdated and no longer supported.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!

a little exhaust pop when shifting...

TheRealBuzz

TheRealBuzz

Husqvarna
AA Class
2009 TE450

On the ride into work this morning I noticed just a little exhaust pop when shifting sometimes. It wasn't there before and this is my first ride since checking my valve clearance.

My vales were not perfect but not really bad. Wear was even across all valves and the bike has been running great so I planned to leave well enough alone and work on it over the winter.

I'm sure I've got everything reassembled properly.

Could checking the valves have caused this?
Could rolling the bike to find TDC cause this?
Could a bit of a leak in the valve cover be causing this?

Thanks
 
An exhaust leak will cause it even if it's a very small leak. Air is introduced in the exhaust stream of a momentarily rich condition when you back out of the gas to shift. You have a small amount of unburned fuel and some oxygen from the air leak plus the temp is high enough to ignite the unburned fuel and you get a pop.
 
lankydoug said:
An exhaust leak will cause it even if it's a very small leak. Air is introduced in the exhaust stream of a momentarily rich condition when you back out of the gas to shift. You have a small amount of unburned fuel and some oxygen from the air leak plus the temp is high enough to ignite the unburned fuel and you get a pop.
Click to expand...

You are referring to a leak in the header pipe connections? This is possible as I also just put on a new heat shield and had the springs off.
 
TheRealBuzz said:
You are referring to a leak in the header pipe connections? This is possible as I also just put on a new heat shield and had the springs off.
Click to expand...
Yes especially at the header pipe but it can still do it if there's a leak at the muffler connection. In extreme conditions you can get popping from the fuel re-igniting as it exits the pipe.
 
Thanks to all for the quick and knowledgeable responses.

I gave all the header connections a little wiggly jiggly to re-seat them. After just a small test ride it's looking, and sounding, good!

Cheers.
 
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