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 The previous version was outdated and no longer supported.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

Throttle Position Sensors??

F

F1000

Husqvarna
A Class
The TE449 has two, I have removed the second butterfly. The one sensor seems faily obvious as a thrrotle poition sensor, I adjusted this to .8V. The second one seems to work a servo that adjusts the throttle position slightly. What does this second throttle position sensor exaclty do? Does the ECU take feedback from it? How is this adjusted and does this affect the starting ability of the bike?
 
Still having difficulty starting my bike, runs perfect once started. The TPS sensor (non butterfly), seems to have little affect on the starting, even when pushed to the limits in both directions. I did verify the voltages on it prior, set it to .8 and it went to about 1.5 wide open throttle. It doesn't seem to make much difference no matter where I set it. I reinstalled the secondary butterfly, and that made a difference on starting, but seemed inconsistent. Again adjusted that from stop to stop and it just did not start reliably. The bike runs on when starting. almost like it is running with the starter pressed, but just not quit. Have to hold the starter for a long time and lucky if it catches. I am not sure it if it is too much fuel or too little. Very odd. Worse when hot. I am beginning to suspect the valves. How picky are these bikes with the valve clearances? I need to make some accurate measurements, but quick measurements indicate the intake are loose, .007" and exhaust was slightly tight at .009". Is the run on when starting an indicator of a lean condition?

Also, I don't believe the quick TPS adjustment does a damn thing.
 
I never hold my starter on for more than 1-2 seconds. It usually takes 2 or three of these small bursts to get it idling when cold. Butterfly in, Akro exhaust.
 
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