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 The previous version was outdated and no longer supported.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

Auto decompressor blues ? question

Jerulator

Jerulator

Husqvarna
AA Class
Hello everybody / anybody ! Its been a while since I've checked in here at Cafe Husky Anyway, I'm not sure but I think I'm having troubles with my 2004 TC 450 "auto-decompression device". My bike has become hard to start and I can hear a horrible metallic sound coming out of the cylinder head while attempting to start her up. It sounds like a metal on metal seizure but I'm pretty sure its not the piston or valves or anything. So I removed the valve cover to take a look, the valves look ok and measure within spec (.006 and .008), but the auto decompressor cam is really loose (which I don't remember it being so loose). How can I determine if that is the actual cause of the starting trouble and the horrible sound eminating from head ? If that is the problem, how difficult is it to replace / repair ? Thanks in advance
Jerry
 
This is my story way back when my bike was fairly new.

I installed the new de-compressor lifter this weekend and my 05' TE510 starts like a dream again, e-button and manually. Lets just hope it lasts this time. I have a good feeling about it this time as you can see from these compelling pictures of the Old versus New, particularly in how the lifter aligns with the rocker arm. The alignment pictures were taken with the camshaft positioned as far to the left as possible with no slack. It's clear to me that the old part is flawed as was the original part that came on the bike from the factory.
The original lifter failed at 173 miles. Husqvarna sent me a replacement they pulled off another bike. It happens to be the one I replaced this weekend after failing just inside 600 miles.




I slid the shim over the right end of the camshaft.
There was to much "slop" in my opinion, causing
The lifter to, intermittently, slide off the end of the lobe.
The shim took up some slack and kept the camshaft
positioned more to the left.
image.jpg

Even though the new de-compressor lifter has much better alignment, I shimmed the camshaft anyway to keep it positioned to the left. There is still a very small bit of play in the the camshaft side-to-side movement which is probably a good thing.
I believe this will help solve other TE owner starting problems. I'm somewhat frustration with Husqvarna's denial of this flaw. It's obvious to me that they have improved this part and won't admit it. This has not been a pleasant experience for me to say the least. And I would hope that after seeing these pictures, Husqvarna would at least cover the replacement cost of this part. I'm willing to bet that most of the TE510 owners that complain of starting problems, have this De-compressor issue.
image.jpg

I'm not kidding when I say my bike now starts effortlessly with this new de-compressor. All I have to do is put enough weight on the kick starter to push it through and it starts every time and that's how it should be. I haven't even adjusted the valves or changed the stock jetting yet. Things may be different for the 250's and 450's but I'm telling you, there is no way to start the 510, e-button or manually, when this de-compressor fails.
image.jpg
View attachment 42136image.jpg
 
Thanks Xriderdown ! a picture is worth a lot of words (your words helped a lot though). Gonna look at it again tonight.

Xriderdown said:
This is my story way back when my bike was fairly new.

I installed the new de-compressor lifter this weekend and my 05' TE510 starts like a dream again, e-button and manually. Lets just hope it lasts this time. I have a good feeling about it this time as you can see from these compelling pictures of the Old versus New, particularly in how the lifter aligns with the rocker arm. The alignment pictures were taken with the camshaft positioned as far to the left as possible with no slack. It's clear to me that the old part is flawed as was the original part that came on the bike from the factory.
The original lifter failed at 173 miles. Husqvarna sent me a replacement they pulled off another bike. It happens to be the one I replaced this weekend after failing just inside 600 miles.




I slid the shim over the right end of the camshaft.
There was to much "slop" in my opinion, causing
The lifter to, intermittently, slide off the end of the lobe.
The shim took up some slack and kept the camshaft
positioned more to the left.
View attachment 42137

Even though the new de-compressor lifter has much better alignment, I shimmed the camshaft anyway to keep it positioned to the left. There is still a very small bit of play in the the camshaft side-to-side movement which is probably a good thing.
I believe this will help solve other TE owner starting problems. I'm somewhat frustration with Husqvarna's denial of this flaw. It's obvious to me that they have improved this part and won't admit it. This has not been a pleasant experience for me to say the least. And I would hope that after seeing these pictures, Husqvarna would at least cover the replacement cost of this part. I'm willing to bet that most of the TE510 owners that complain of starting problems, have this De-compressor issue.
View attachment 42138

I'm not kidding when I say my bike now starts effortlessly with this new de-compressor. All I have to do is put enough weight on the kick starter to push it through and it starts every time and that's how it should be. I haven't even adjusted the valves or changed the stock jetting yet. Things may be different for the 250's and 450's but I'm telling you, there is no way to start the 510, e-button or manually, when this de-compressor fails.
View attachment 42139
View attachment 42136View attachment 42141
Click to expand...
 
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