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 The previous version was outdated and no longer supported.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

Lost compression

rockdancer

rockdancer

Husqvarna
Pro Class
Looking at picking up a low hours 2010 TC250 that is selling cheap due to a loss in compression
The bike still turns over ok but has very low compression . Will not start. I am looking at getting it for 1000 to 1500 less than value if it were running well.
I am thinking the valves may be put out of wack - so it could be an easy fix. Not a 4 stroke expert though
Any thoughts ?
 
Low compression might be dusted engine,mates husaberg 450 died on the trail and would not start had to tow him back.
Thought it might be a fi problem but required new cylinder and piston $1500 total on a 90 hr motor, just saying.
 
Need to check Piston/Piston ring/Cylinder and Valves/Decompressor. Firstly check decompressor.
 
I am thinking/ hoping it might have slipped a tooth on the cam chain . I don't think it would be worn valves - damaged would be noisy ?

I will ask about air filter

starting to get cold feet - can always put a 250 2t in it or part it out ....
 
I could take a compression tester and do a leak down test -
Please clarify what you mean Normann - whats the Valves decompressor?
 
Its a decompression it opend a valve on the compression stroke so the engine can turn over quicker and hopfully ignite.
On my yamaha its centrifugal so normal operating speeds its shut but as soon as the engine dies it opens a valve a smidge.

Think real hard before getting it.
it could of dropped a valve thats new valves repair head maybe valve seat and new piston perhaps the barrel if its rattled around in there.
Expect the worst you dont know how honest the guy is. An bid him low cus you may be forking out a lotta coin on it.
 
rockdancer said:
I could take a compression tester and do a leak down test -
Please clarify what you mean Normann - whats the Valves decompressor?
Click to expand...
As juicypips said, decompressor pin on exhaust camshaft does exhaust valve opened on low revs. If you want to measure real compression, then need take valve cover off and de-activate decompressor, else you will see pressure ~6-7bar (70-80psi) only.
 
Find the problem is very easy. Remove spark plug, set the piston in TDC, lock crankshaft, pump compressed air to cylinder (~2bar) and hear the noise of the coming out air. If hisses from breather - piston|ring|cylinder, if hisses from muffler - exhaust valves, if hisses from airbox (open throttle just a little) - intake valves.
 
thanks for the help people - I asked him to text me some pics of bike and air filter as it was right now and it was filthy as was air filter - so I pulled out ( young guys who dont look after their bikes )
I would do that test but it is too far a drive away to risk a bigger issue
Still a decent buy though - as the bike would be worth more as parts
 
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