• 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 The previous version was outdated and no longer supported.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 310 1st Ride - Post break-in thoughts?

kleemann;34293 said:
Your bike is not lean at altitude- it feels "lean" because its making less power vs sea level. The bike is measuring the air density no matter where you ride and making fuel load delivery calculations many times a second.

O2 sensor plugged in = lambda 1 as a target fuel ratio (14.7:1) "lean"
O2 sensor unplugged = lambda .8 as a target fuel ratio (12:1) "rich"

Lambda 1 is ideal for emissions, lambda .8 is ideal for power. Leave the O2 unplugged for max power no matter where you ride. Just remember the higher you go the less power you will make with a normally aspirated engine.
Click to expand...

Yer right, my common sense didn't kick in when I origonally wrote this... At 6,000 ft+ the bike was hard to start and has a tendancy to die if you don't rev it up as you engage. Even when hot, pulling the choke helped with the starting issue. If having the O2 plugged in gives a leaner mixture, I belive I'll give that a whirl and see if I experieince the same sensation. Easy enough to do anyway. I can deal with the power loss, not the end of the world. Just want to clean it up a bit. And great article on how EFI works! Very informative, thank you.
 
RLW;34297 said:
Nice review


I suspect, coming off a KTM, much of what you're feeling is more the closer ratio transmission than it actually being geared to low or engine size.
(however it could still be too low for your riding style/conditions.)

The Husky's are definitely closer spaced between gears than the EXC's and you'll likely find yourself doing more quick short shifting, but you adjust to it. Personally I find the close ratio better for mountain trails and/or tight conditions and easier to keep in the meat of the powerband.
When riding a friends geared down 525EXC on faster paced steep/switchback trails, I find myself shifting between 2nd/3rd quite a bit, where on my stock geared TE510 I typically get into 3rd and can leave it there longer until we hit the straights and open them up......at this point the closer ratio has quicker acceleration, but pretty sure the EXC has more top end.
(at least we assume so based on paper. Around here, not too many places to try to run much over 80mph in the dirt, to know for sure.....plus while the Husky may be stable at speed, I'm not so sure either of us want ride a KTM w/o steering stabilizer at that speed anyway)



For HP loss, a reasonable rough estimate is about -3% per 1000ft.....as above table/calc's probably show.
Think that appiles not only normally aspirated engines, but also for my old out of shape body, and maybe I can add another -1% per year past 40
Click to expand...

You've got a good point on tight trails and being able to keep it in the meat of the powerband. Been on the 450's since 2000 so this is going to take some getting use to. It's kind of like learning to ride all over again, but in a good way!
 
I had a 2008 TE and rode from sea level to 6,000 feet. The bike always started and ran fine but of course there was the power loss to contend with. I'd love to head to the higher passes on Colorado some time and see how well the EFI works at 12,000 feet.

NC
 
Well, I got my 2nd ride in today, and things are looking up! Back up in Prescott but plugged the O2 sensor back in and what a difference. Still has a bit of an issue from time to time stalling, but nothing like it was. She runs like a champ. Was worried about the gearing, but having gotten use to it, I really like the stock gearing in the nasty hills and tight twisty's. Still taking it pretty easy on her, but love the motor. Pulls hard in the mid range, and pulls all the way to the top. Bottom end isn't what I'd like it to be, but again, expect that from the smaller bore. I'll take the trade-off for the mid-range pull it has though. So far I haven't done much with the suspension as I'm trying to get a good feel for the bike. Have the sag set for me, and stiffened up the front end a couple clicks. Bike is extremly predictable in the rocks and whoops. Continue to be impressed at just how effortless this bike is to throw around in the twistys. Bike is so easy to plant and stick into a corner, I'll take killer handling over a hot motor all day long. Long of the short, still loving the bike. It's easy to ride and more importantly, FUN! Right on Husky. You got it right in my book!
 
ktmtom;35575 said:
Well, I got my 2nd ride in today, and things are looking up! Back up in Prescott but plugged the O2 sensor back in and what a difference. Still has a bit of an issue from time to time stalling, but nothing like it was. She runs like a champ. Was worried about the gearing, but having gotten use to it, I really like the stock gearing in the nasty hills and tight twisty's. Still taking it pretty easy on her, but love the motor. Pulls hard in the mid range, and pulls all the way to the top. Bottom end isn't what I'd like it to be, but again, expect that from the smaller bore. I'll take the trade-off for the mid-range pull it has though. So far I haven't done much with the suspension as I'm trying to get a good feel for the bike. Have the sag set for me, and stiffened up the front end a couple clicks. Bike is extremly predictable in the rocks and whoops. Continue to be impressed at just how effortless this bike is to throw around in the twistys. Bike is so easy to plant and stick into a corner, I'll take killer handling over a hot motor all day long. Long of the short, still loving the bike. It's easy to ride and more importantly, FUN! Right on Husky. You got it right in my book!
Click to expand...


So you are running the bike de-restricted but with the lambda plugged in correct? What kind of fuel range do you get like this?

NC
 
Correct. O2 is plugged in and bike is unrestricted, currently without spark arrestor plug (I'll be putting that back in though since it's required everywhere) Anxious to figure the mileage out too, however I won't fill up with fresh fuel till next weekend when we go riding. I'll keep ya posted, but curious as to what others have been experiencing. I'm HOPING I can get a minimum of 60 miles on a tank unplugged, and 70 plugged. If you've got a TE 310, lets hear what kind of mileage your getting with your current setup!
 
I was out on a TE310 on the weekend in competition mode and was on fumes at 80kms. We were on the gas really hard though.

There is a lot of power left in the 310. I have been tinkering with the I-Beat and will post my findings when I am confident that they work better. From my findings, the bike is too rich. Leaning it out with the I-Beat seems to be making a big difference.
 
Bike runs a bit on the rich side for sure right now, not having tinkered with the map. I'll be anxious to get your take on the I-Beat findings. Would love to spend the money on the software to have for years to come, but is it a user friendly program for do it yourselfers, and is it a program specific to one make/model of motorcycle? And getting 50 miles (comp. to 80kms) is a bit disappointing, but if that's when the light comes on, does anyone know how much is left in reserve at that point?
 
Ive been posting over at ThumperTalk regarding a Yamaha WR250F build up Im doing- but Ill post the dynos here as they are relevant. These show the difference in power between 10:1 AF (very rich), 12:1 (good for power) and 14:1 (best for emissions).

10:1 vs 12:1, peak gains are not that high but look at the area under the curve!

3600580001_cf7732c3b0_o.jpg


Point of diminishing returns. Max power gains have been relaized at 12:1, further leaning to 14:1 shows no increase in power, further leaning would ultimately decrease power, but that is dangerous!

3600815665_1c5dbe5373_o.jpg
 
kleemann;35634 said:
Ive been posting over at ThumperTalk regarding a Yamaha WR250F build up Im doing- but Ill post the dynos here as they are relevant. These show the difference in power between 10:1 AF (very rich), 12:1 (good for power) and 14:1 (best for emissions).

10:1 vs 12:1, peak gains are not that high but look at the area under the curve!

3600580001_cf7732c3b0_o.jpg


Point of diminishing returns. Max power gains have been relaized at 12:1, further leaning to 14:1 shows no increase in power, further leaning would ultimately decrease power, but that is dangerous!

3600815665_1c5dbe5373_o.jpg
Click to expand...

It is incredibly relevant.

Is this what is going on?

First pic green/blue = 12:1
First pic red/pink = 10:1

Second pic green/blue = 12:1
Second pic red/pink = 14:1
 
Exactly!

I have my 05 TE450 on the dyno now- going to do some fine tuning of the jetting. I will post up pics and details (and start a new thread)!
 
I'm a little slow, but if I get this right, it appears running the leaner set up (O2 plugged in for the case of my TE310) I'm not really giving up any signifigant performance gains, possibly getting better mileage, AND Im being more environmentally friendly for all the eco nuts out there listening?! Great information guys, thank you.
 
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