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 The previous version was outdated and no longer supported.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

Somebody help! 2008 TC 510 is driving me crazy

Paul S

Husqvarna
A Class
My 2008 Husqvarna TC 510 motocross bike has been having difficulty starting. After 50 kicks I give up. I put it back in the garage and the next day it starts right up. It occassionally back fires or kicks back when I'm trying to kick it over. Once it's running it keeps on running. It's only inconsistant when I'm starting it, warm or cold.The carb has been cleaned, spark plug and wire changed, fuel cap vent checked, valves checked, leak down test, ground wire checked.
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How long have you had the bike? Lots of modern 4 strokes seem to have a method or routine they like hot or cold. Some like a few whacks of the throttle cold (lots of fuel), some that is a big no no. Some like a choke some don't. Does your bike need the choke to start? Will it die if you turn the choke off right away after getting it running? If so it is lean and likes fuel and a few whacks of the throttle before kicking might help. If not it might be on the rich side and like zero choke and throttle as in keep your hand off the throttle while kicking. Got to find out what she likes and stick with it. Some bikes like to be laid over until gas drips out then start way EZer. I found that generation of bike 04-11 450-510 can be very hard starting machines. I had a 04 TE450 that I could almost not start with the kicker luckily it had a e-start that never failed. Seems these bikes sometimes like you to very slightly crack the throttle while kicking.
 
How long have you had the bike? Lots of modern 4 strokes seem to have a method or routine they like hot or cold. Some like a few whacks of the throttle cold (lots of fuel), some that is a big no no. Some like a choke some don't. Does your bike need the choke to start? Will it die if you turn the choke off right away after getting it running? If so it is lean and likes fuel and a few whacks of the throttle before kicking might help. If not it might be on the rich side and like zero choke and throttle as in keep your hand off the throttle while kicking. Got to find out what she likes and stick with it. Some bikes like to be laid over until gas drips out then start way EZer. I found that generation of bike 04-11 450-510 can be very hard starting machines. I had a 04 TE450 that I could almost not start with the kicker luckily it had a e-start that never failed. Seems these bikes sometimes like you to very slightly crack the throttle while kicking.

I've owned it since new. When new it started easily in a few kicks, and it did need a few blips of the throttle and choke. Because of it kicking back, I stopped giving it any gas, but I still choke it. It behaves like it's flooded. When I shut off the fuel supply and let it sit for a few hours, it may start in a few kicks. The next day I will turn on the fuel supply, choke it and after 50 kicks I give up. I'll pay attention to what I do to see what works and what doesn't.
 
I've owned it since new. When new it started easily in a few kicks, and it did need a few blips of the throttle and choke. Because of it kicking back, I stopped giving it any gas, but I still choke it. It behaves like it's flooded. When I shut off the fuel supply and let it sit for a few hours, it may start in a few kicks. The next day I will turn on the fuel supply, choke it and after 50 kicks I give up. I'll pay attention to what I do to see what works and what doesn't.

It is almost impossible to start it sitting on the bike; you need to have it on a stand or have someone hold it up in order to get a good kick.
 
The decomp sounds very possible.

When I picked up the bike new from the dealer I was shown how to start it. It was a matter of finding tdc, pull the leaver and just nudge it past tdc and give it a kick. It would start right up. My friend has the TC450 with both auto and manual, for some reason mine only has manual.
 
I found the adjusting screw at the bottom of the carb open 1.5 turns which is correct for the 250. I opened it 2 turns which is correct for a 510 and the bike started right up. I don't know if it's one of those days where she just wants to start. I'll see if it starts tomorrow.
 
Today I repeated what brought me success in starting the TC510 yesterday but today she wouldn't start at all. Back to square one.
 
You might want to research that. I'm pretty sure all 510 models have the auto-decompression as well as the manual release. In my experience( have replace 3 on my 05) the bike started up perfectly after each replacement.

The 2008 TC 510 only has the manual decompressor; but could it also be causing my starting problem. What goes wrong with the decompressor that causes the starting problem? It functions as it should, it allows me to pass TDC to kick it over. I find that it may have less compression when I kick it over; could that be a sign of the decompressor acting up? I'm reaching the point where I feel like just piecing the bike out.
 
I hear you.....this is crazy. I can't confirm whether or not the bike came with one. However I just can't believe it doesn't have one.

So have you popped open the valve cover and looked for a little doohickey that looks like this on the right side of the camshaft? If your bike doesn't have one of these, the chances of starting it are overwhelmingly against you. There's just no way you'll get the proper spin out of that high compression motor in order to fire it up. If you do have that doohickey, replace it.

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I hear you.....this is crazy. I can't confirm whether or not the bike came with one. However I just can't believe it doesn't have one.

So have you popped open the valve cover and looked for a little doohickey that looks like this on the right side of the camshaft? If your bike doesn't have one of these, the chances of starting it are overwhelmingly against you. There's just no way you'll get the proper spin out of that high compression motor in order to fire it up. If you do have that doohickey, replace it.

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The 2009 TE 450/510 have it, not the 2008 TC 510's, just manual.
 
pretty sure your tc has an auto decomp device on the exhaust cam as has been mentioned, and I think it should be looked at .what wears is the nub on the bottom.i think xriderdown is on to something here.dan
 
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