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 The previous version was outdated and no longer supported.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

HELP my Smr 449 doesn't want to take the throttle

Londin

Londin

Husqvarna
AA Class
So the bike is from 2011 and I have never had a problem. The bike is a track bike and therefore doesn't have an easy life.
Anyways the bike began last weekend during a race to "pop" from the exhaust under heavy braking. Then it began to be more en more. Every time I wanted to give it some throttle is booged and/or popped and came back to life. I had to stop as it was to dangerous to ride. It was raining on/off all weekend to thought it was moist somewhere. It starts just fine by the way.
So I've had a look today(been standing dry for a week so moist would be gone) and tried the following but with no luck
- replaced spark plug
- checked for air "leaks" around injection and air box
- checked all wire for damage
- check grounding wire(the one from the ignition coil has been modified)
- check the "race plug" if it was loose or something
- disconnect the JD tune
- TPS reset
- Charged the battery
- checked fuel pump, fuel filter, overflow hoses(if they where squzzed) and fuel transfer from one fuel tank to the other.

Nothing worked!

Then I tried to adjust the JD tune so all was set to 5 ( I have map3 so normally it's between 1-2) and it became better but still fare from good!

What is the next step I need to do?

The bike has been running with full noise all weekend with no problem! So all my settings was all fine.

Mods to the bike
- "race plug"
- map3 installed
- JD Tune
- TC air box lid
- full Arrow Ti exhaust
- ZipTy oil breather kit
- 2nd butterfly removed
 
Forgot to mention that I have checked fuel pump, fuel filter, overflow hoses(if they where squzzed) and fuel transfer from one fuel tank to the other.
 
The injector should have a tiny gauze basket on the inlet, I'd check that is clean.
I read on the forum here somewhere about a weak/failing fuel pump too. Also o-rings for the pump...
If you can, check the pump pressure.
It may run & pump fuel, but if the pressure is low, it will be lean.
 
Suputin said:
THIS kind of thing is why I run an A/F mixture gauge. No guessing as to how the motor is running.
Click to expand...


What kind are you running? I've been thinking about putting one on my TE310, but I want something small and unobtrusive. The one's I've seen are as big as automotive gauges.
 
Thanks for the input guys, really appriciate it.
Will have a closer look over the weekend and will report back.
Any idea how I can measure the fuel pump pressure?
 
Place a fuel pressure gauge in the end of the line & either jump-wire the pins on the pump, or easier leave it competed to the bike & touch the starter button once.
The pump 'primes' for a few seconds then stops.
I'm going from memory off another thread, but I think I saw 37 psi as a spec?!?!.

Help, anyone.....
 
Pump should put out about 55 psi and then the pressure regulator should trim that down to 42 psi, those are the readings on my older TE450
 
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