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 The previous version was outdated and no longer supported.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

My EFI learning experience continues...and a couple of questions...

Phoenix

Phoenix

Husqvarna
AA Class
So after a new cam, JD tuner (with excellent setting suggestions from Ioneater), TPS set to 101.5, a new starter motor and various other little tweaks, my 2010 TXC 250 has been performing unbelievably well. The bike has had few flameouts, throttle response has been smooth and predictable and the bike has felt stronger overall. Oh, did I mention it has been starting even when hot with the e-starter? :applause:

Well this weekend, we go to Red River Motorcycle Park near Muenster, TX (site of Last Man Standing). We got dressed and the husband filled the tanks. I fire the bike up and let it warm up, then we all took off and goofed around a bit in the parking area. I tried to do a little wheelie and the bike just sputtered. I was a little irritated, but thought maybe it was just not warm enough yet. We took off and the bike continued to run rough and backfire. Gas was coming from under the gas cap, so I twisted it a little tighter. We get to the single track (Bills Woods) and the bike is still running like crap. The trail is muddy with wet roots and rocks. I knew my day was not going to be a happy one as this trail gets harder the farther you get into it. I pulled over while others rode away and decided to check the tank. Gas was still coming from under the gas cap, so I thought maybe the tank was way overfilled. I'm not an expert here - just angry, desperate and guessing at this point. To my surprise, the tank had way less gas than I would have expected. I poked the rubber seal back up into the top of the cap and refitted it. Again to my irritation, the bike wouldn't electric start. It was doing that same old "catching" that it used to do. So I pull out the kickstarter and she fires up. I turn the throttle and the bike accelerates smoothly then pops and dies after a few hundred feet. When I met back up with the group, I told them about the cap. My husband said..."oh that fell out when i was filling it...I just stuck it back in there." I started it back up and for the rest of the day it ran awesome once again and electric started reliably.

So, in my quest for knowledge...what was going on? I assume that my husband hadn't gotten the seal back in the gas cap properly and air was getting in and making it lean? Its just amazing to me because my old carbed KTM would run without the gas cap on at all.

Perhaps on a similar note...the only real "problem" that I have with this bike is that it will die when leaned over and gassed. Not all the time, but sometimes. I've noticed it in particular when you get stuck pointed the wrong direction and have to lean the bike over and spin it around. It also happened going around a tight corner this weekend. Fortunately, a tree was on the inside of the corner and I just tipped over onto it. lol. Is this normal, or is there something to check? Could it be fuel pump related? Floating fuel pump? The tank has been at least 3/4 full each time it has happened.
 
I do not think the leaky gas cap is causing your issue but I could be wrong. My bike did something similar to this popping and running crappy one time and it turned out to be the battery. I was using a turn tech 2.5 that must have had too weak of a voltage and was causing the ECU not to run right with such low voltage on start up. Once the battery got warm and more current it would ran fine later. Not saying this is your problem but worth checking. Also a loose terminal can cause this.
 
I'm with raisrx251 check the battery, the only time my 310 did that the battery was almost totally flat ( it was flat 5 minutes later & the bike died ), also check the positive lead, mine rubbed on the frame & started shorting.
 
Yep- the gas cap is unrelated to your stalling- the seal on the stock cap is problematic at times- it has to be lined up just right in the cap prior to tightening. Before I got the IMS tank I got in the habit of tipping the bike to verify a good seal prior to riding off after refilling.

So you are left with the question why is my bike stalling at low throttle movements (around corners/ leaning).... this is an area where a symptom of a problem running issue is shown more easily. I'd check electrical connections as mentioned battery, coil, spark plug cap, test battery, check fuel pump is seated properly and secured (if not properly done prior and you are confident).

What's left after that?... maybe your fuel settings are "good"/better in some areas- but you have some more tweaking to do. What's the idle rpm once its "hot"? Maybe just turning the air bypass 1/4 turn in/out when the bike stalls and try to repeat- might be that close and all you need. Only "test" ride with the bike properly warmed up and to an engine temp you would normally be riding at.
 
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