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 The previous version was outdated and no longer supported.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

TE 511 Running on

L

Lucanuda

Husqvarna
Hi All,

New member Luca here. l have been watching the forums for a while and have found them very interesting.
l have a couple of Huskys a 2011 TE 511 and a 2013 Nuda 900r, they are both great bikes, l have done quite a lot of work to both and will post some pics later.

At the moment l have a problem with the 511 in that it is running on, on a closed throttle.
The bike has an Akro silencer and has been mapped for that.
l have had the bike around 8 months and at first it was fine, l have fitted crossover tyres and mainly run it on the very tight B lanes around where l live.

A while ago it started running on, on a closed throttle. The bike doesn't do it straight away from the off it only happens when the bike has been stood for a while say after l have stopped for a coffee. when l go back to the bike and start to ride it again it then runs on.
l have had map 3 loaded on and the TPS reset, but it still does the running on.

Dealer is baffled, and so am l Can anyone help****************************************! shed light on the cause.

Many thanks Guys
 
When you say "running on" do you mean the throttle is sticking or high idle? Sorry, I'm just not familiar with the terminology.
 
Check the valves I had a bike with a intake valve out of whack that would cause it to rev up and up and up and up....Sounds weird but maybe that is possible?

Otherwise, something must be causing it to rev up, it could be running lean, stuck throttle cable or plate, for it to run "up" properly it needs more air and fuel. More fuel would not cause the idle to go up and up as it would run out of air. Overly rich and bog. Too much air and when you touch the throttle it would crackle or pop....

But with a leaky valve you could be getting intake air/fuel during or on exhaust combustion and that could cause revving up without any change in the mixture...

Short of that, no idea.
 
If you mean the idle hangs at times after closing the throttle, there are quite a few that do it.
Obviously check mechanical things first like the air boot mentioned, also throttle cable adjustment, sticking throttle or throttle body.
The other possible cause is electronic.

There is a second butterfly controlled by an electric motor on a shaft on this model. (Fly-by-wire throttle)
On the other end of the shaft is a small cam that lifts an arm down to the primary, cable controlled butterfly, to control idle.
You can try adjusting the large brass idle air screw in slightly 1/4 turn & see if that helps.
Myself & several others have not been able to cure it this way & have resorted to removing the roller that the cam operates.
The idle can then be looked after entirely by the brass air screw.
Provided you have it high enough hot, cold idle is still normal.

If large changes are needed on the brass air-screw, it also effects mixture, so you may need to compensate for that.
One way is to fit a piggy-back tuner of some kind.
Another way is the make physical adjustments to the throttle position sensor (TPS) idle voltage which will richen the mixture.

I also had issues with the poor throttle response of the FBW butterfly, so I removed the butterfly itself.
The difference is very noticeable.
(This however has no bearing on idle either way, so you may chose to leave yours in)

Hope that helps.
 
Idle air screw. When I first bought my 449 it idled very high and had no engine braking. Adjust that brass idle screw down bud.
 
Hi All,

just an update on the running on

I spoke to workshop manager at Husky Sport in the Uk

He said he had, had a customer in a while ago with a problem on a 511 were the bike was ok for the first hour or so of a ride then started to play up running on and dying then starting again but running irratic.

The workshop hooked the bike up to the computer but could find no issues logged, so reset the TPS, and assumed that all would be ok!!

A week later the guy was back advising of the same problem, it made them scratch their heads a little.

Anyways the Manager said that after a further serious look at the bike he decided it may have been an issue with the injection system / fuel pump, playing up.

They took the fuel tanks off and removed the fuel pump, upon inspection they found fine silt had got through the filter and was causing intermittent partial blockage of the system.

He advised that this silt could have got into the fuel tank because the bike had been partially submerged in muddy water while on a trail or the overflow pipe which exits at the back of the moter and usually ends up between the bash plate and underside of the moter, had sucked in some contaminets.

He suggested that l have a look at mine to see if there was any silt present.

I stripped the tanks out and stripped down the pump. Sure enough there was lots of very fine silt inside the fuel pump.

I gave it a very good clean out in petrol and replaced the pump / tanks, I then refilled with fresh fuel.

After all this I gave the bike a shakedown at the weekend and it seems to be running absolutly fine with no running on issues at all, thus far.

I was out for approx. 4 hours on various types of terrain and 3 or for stops, so fingers crossed its cured it.

Many thanks to Husky Sport UK :banana:
 
Well, I hope that it continues to behave.
As a mechanic, I can't imagine how silt in a fuel pump/filter could cause your symptoms, but if it is working for you good stuff!
 
Hmmm, running lean shouldn't really increase revs with the closed throttle.....
The engine still has to get air from somewhere, i.e. an open throttle plate, air by-pass port or similar.
If the primary throttle shuts & isn't powered open by something (second butterfly-shaft cam, sticky cables) then there shouldn't be enough air avail.

Curious :thinking:
 
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