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 The previous version was outdated and no longer supported.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

TC450 start problems

B

Bart

Husqvarna
AA Class
So yesterday I bought a 2008 TC450 (Carb, kick start only, Arow titanium exhaust), 17hours since full rebuild (at least that's what the seller said).
Anyway the seller started it on second or third kick, no difficulties (altitude being close to 150meter, with 22Celsius degrees), I made a short test ride to make sure the transmission was well and no defects.

I hit the kill switch and started to kick it again, to see if I could start it, well after 3 kicks I had it running (being new to a 4t kickstart, can kick my WR250 all day long, starts every time).

Now to get to the point, got it home (close to 200meter altitude, 22 degrees Celsius), I cant get it to start, I must have kicked at least 40times, even had some help with it.
Started with the procedure as in the manual, petcock/tap open (screw type, counter clockwise is open), puled cold choke out (black knob), ((made sure red knob/ hotstart was in), twisted throttle two times (ACPump) searched for TDC, pulled the decomp lever, and slightly lower the kickstart/leg (past TDC), then let go of the decomp lever and kicked it.

I've had it running after quite a few attempts, it heated up very quickly, and it didn't run very nice some popping and flames (carburetor lean?), also cut out quite fast, tried it with choke on and of.

Made sure it got fuel, and had a spark.

What will cause this symptoms?
Valve clearance, carburetor jetting, timing, ignition?

Kinda lost in the whole 4stroke happening, I'm quite handy if I say so my self unfortunately don't have much experience when it comes to 4t wrenching, (2t no problem).
 
Fuel mixture screw on bottom of carb? I think the procedure is to turn all the way in until it stops and then back it off two full turns. Keep us posted. Sounds like fuel issue. Could also be timing, you are right.
 
Pull the carb and clean the pilot jet with a small copper wire, like a single strand from a speaker wire. Spray cleaner and compressed air will not remove caked on varnish.
 
Hmmmm my 07 TC 450 is such a breeze to start. But for sure, clean the carb and pilot circuit.
My start trick is; petcock on, choke pulled, pull the decompress lever and hold while actuating kick lever about 4 times, release decompress lever, twist throttle 2 times, find TDC with kick start, bring to top of stroke, and use a full long kick (no 2stroke jabs). Mine starts first kick, even with the tail pipe plug in.
 
I've pulled the carb these are my settings;
Highspeed- 180
Lowspeed- 45
Needle- OBDVR
POS Clip- 6
Starter- 85
Slide-15
Fuel Screw- 3

Does this seem right for a stock 2008 TC450, running at around 100 to 300meter (10C degrees to 30C)?
Were can I find a jetting diagram (not in the owners manual).
 
I think I got is sorted, can start it second or third kick when cold (without choke).
Cleaned the carb, wasn't that filthy actually, but the ACPump was, (rust from the diaphragm ring), cleaned it and put it pack in (diaphragm it self wasn't damaged).
Also cleaned the tank and petcock, air-filter is fine.
 
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