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 The previous version was outdated and no longer supported.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

Problems starting SMR449

Was the video a hot or cold start? You say you tested the battery, what was the standing voltage (at rest), what was it when cranking, does the voltage drop below 10v when cranking? What is the voltage when the bike is running?
 
Huskynoobee said:
No manual decomp on these. I have the same problem on occasion. I've started killing it using the kill button, then I leave the ignition on until I hear the ECU shut down. Seems it likes that better. I've had it do the fail when cold first thing.
Click to expand...

I watched George work on one of these and they do some adjusting and "seeking" (you see the throttle assembly move a few times) after you shut them off.

Other than that I got nothin.
 
OlderHuskyRider said:
Was the video a hot or cold start? You say you tested the battery, what was the standing voltage (at rest), what was it when cranking, does the voltage drop below 10v when cranking? What is the voltage when the bike is running?
Click to expand...
I would check the voltage of the battery when hot and having the problem. If battery voltage is okay, then I would consider checking main ground and main power leads to the starter. I have seen this on cars where the hot lead or ground was a poor connection to the battery, so you will need to physically remove the lead, clean it and reinstall it on both the battery and other connections like at the engine or starter.
 
OlderHuskyRider said:
Was the video a hot or cold start? You say you tested the battery, what was the standing voltage (at rest), what was it when cranking, does the voltage drop below 10v when cranking? What is the voltage when the bike is running?
Click to expand...

It's a hot start video.

All the voltages are ok, I checked them with the mechanic this morning but I don't remeber the precise value.
Unfortunately we haven't measured the voltage when the problem has occured, but with the engine running properly.
12.5V standing voltage
9/10V when cranking
13/14V when bike is running

We are going to connect the bike to the diagnostic tool next monday.
The trouble is that the bike doesn't have the problem regularly but from time to time.
We are becoming mad :banghead:
 
The original exhaust was replaced by an Arrow model.
Does the lambda sensor has to be removed?
Could the problem be related to that sensor?
 
BR1 said:
It's a hot start video.

12.5V standing voltage

The trouble is that the bike doesn't have the problem regularly but from time to time.
Click to expand...

Just my opinions on this issue, probably worth what it costs you....

A bike that has been running and charging the battery at 13v-14v and with hot thin oil should spin up ALOT quicker than your video shows. It sounds like the battery is on it's last legs and the engine is barely turning over one or 2 compression strokes before it hangs up. My 1 year old Yuasa battery tests at 12.8 standing after sitting overnight, after a ride, it often tests at 13.0 standing. I have hooked my Husky to a car battery in the past to test my battery and a starting problem I was having. The next time you have the problem, hook the bike to a car battery (car should be NOT running) and see what happens. Depending on what happens the battery could be ruled out or it could beshown to be the culprit.

Was the video shot with the bike on the kickstand, leaning left?

On the older Husky motors, leaning to the left hampers the ability of the auto decomp to work properly. Leaning to the right helps the auto decomp to work on the older engines. Below is a pic of the 449 decomp, I cannot figure out how it works, can someone look at it and explain its mechanics?

Husky449Decomp_zps79d90c72.jpg
 
Problem update
It was definitively a battery problem.
Since I have changed battery the problem hasn't been occured anymore
 
You must log in or register to reply here.
Back
Top