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 The previous version was outdated and no longer supported.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

TXC450 (and other 4 strokes) opperating temps

Motosportz

Motosportz

CH Sponsor
Staff member
So I recently installed a Trailtech Vector computer and in line temp gauge. I was a little shocked how high the temps got the other day. I was doing a 3+ mile long, 1st gear nasty hill climb. I have seen many a KTM boil over on this hill and i have never boiled my huskys there. On this day it was only about 85 out but I was hammering it hard and like I said, very slow going and STEEP with endless stepups.

Funny thing is the bike never felt like it got hot, no peculating, no running odd, no boil over, nothing. Did not even really seem hot when i stopped. i was happy about that but the max temp number kinda shocked me.

I know Jeff runs one what are you guys that run a temp gauge seeing for max temp?

On a side note everyone always point to rad guards causing some of this. I disagree. Slow going produces little airflow, guards or not. Here is something interesting though. At the top of the hill I put my hand on the rad guards and they were hot. This to me is a very good thing as obviously the heat is transferring to the guards and the guards have to be acting like a heat sink. i thought it was kind of cool.
 
don't know what the temps were on my 510 but what I do know is that it ran pretty dang good on very little coolant after boiling over and ran right up until it got so hot it cooked a stator. No flubbering, sputtering or hiccup right up until it just cooked on a lap. Put new stator in and fresh oil and it fires right up and has same great compression. I am needing a computer for my TXC, might just do the trail tech myself to see what the temps are. I have installed a stiffer rad cap from a KX85, this should increase the boiling temp and prevent future boil over by a few degrees.
 
BMWHusky Atlanta;1399 said:
don't know what the temps were on my 510 but what I do know is that it ran pretty dang good on very little coolant after boiling over and ran right up until it got so hot it cooked a stator. No flubbering, sputtering or hiccup right up until it just cooked on a lap. Put new stator in and fresh oil and it fires right up and has same great compression. I am needing a computer for my TXC, might just do the trail tech myself to see what the temps are. I have installed a stiffer rad cap from a KX85, this should increase the boiling temp and prevent future boil over by a few degrees.
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it will but it will stress the cooling system. Make sure you have the up-tite Y and reinforce crossover tube or the weak link will fail.
 
So what was the temp? I was stuck in a bad traffic jam the other day, and my bike got real hot. Cooled off fine when I was moving, but I was curious just how hot it was. I am thinking about some sort of temp gauge myself.
 
Uptite Y was installed before the bike was even heat cycled once, then installed the new super duper cross-over link after a few heat cycles (fancy talk for it didn't make it to the break-in service as I was hoping it would when I didn't have the proper size hose during the prep) So I had to change coolant twice before the break-in. Anyhow, I did have MSz rad gaurds on during the 24hr enduro and will experiment with and with out as I have a very trick laser temp tool that I love to have an excuse to actually use. I think the fact that the TXC's actually have an overflow can as a big plus over my KTM 525's, they boil over and now when it does start to cool back down the KTM without resevoir can't reclaim coolant like the Husky's
 
BMWHusky Atlanta;1417 said:
Uptite Y was installed before the bike was even heat cycled once, then installed the new super duper cross-over link after a few heat cycles (fancy talk for it didn't make it to the break-in service as I was hoping it would when I didn't have the proper size hose during the prep) So I had to change coolant twice before the break-in. Anyhow, I did have MSz rad gaurds on during the 24hr enduro and will experiment with and with out as I have a very trick laser temp tool that I love to have an excuse to actually use. I think the fact that the TXC's actually have an overflow can as a big plus over my KTM 525's, they boil over and now when it does start to cool back down the KTM without resevoir can't reclaim coolant like the Husky's
Click to expand...

The cool thing about the TT comp is it keeps max temp until reset.
 
Motosportz;1456 said:
The cool thing about the TT comp is it keeps max temp until reset.
Click to expand...

This may be an excellent thread for the filing cabinet. Just want to clarify cause it took me a few seconds to figure it out.

TT comp = Trail Tech computer, as in speedo/odo/etc.
 
The answer to the question is that 4 strokes, the Husky included want to run below 160 f. Above and you will have problems.

Ambient (outside) temp plays a big role in this. On cool winter days with temps in the 40's and 50's you can ride for days with no coolant.

As pointed out the first thing to fail is going to be the stator. This is a good thing. Means you wont loose a piston or rings when riding at severe overheating, the bike just dies.

Engine heat can be controled with numerous changes, but easiest of all is to not use the clutch as much. The clutch generates heat, big time.

Installing a fan is also a great way to go, but there are many other things to do to lower the heat.

I use oversize radiators, dont block the air flow to them, run an open pipe, run a cooler plug, run slightly rich jetting, use Evans in the radiators, a Y, and ive installed a fan. Might even be worth installing two fans.

Just ideas.

Anyway--ive been using both temp strips and a TT temp guage/computer for a couple years on my 510's and the magic temp limit is about 160-165.
 
Mike Kay;1582 said:
The answer to the question is that 4 strokes, the Husky included want to run below 160 f. Above and you will have problems.

Anyway--ive been using both temp strips and a TT temp guage/computer for a couple years on my 510's and the magic temp limit is about 160-165.
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Where did you mount your temp strips? Thanks, TW
 
Okay, I read about the Y-pipe, but what is the "reinforce crossover tube" you refer to? The '08 comes with what appears to be a 120mm computer fan already installed on the upper section of the right radiator (which would appear to be the side that flows less due to the T-pipe instead of the Y-pipe). That flow "correction" is on my shortlist.
 
Mike Kay;1582 said:
The answer to the question is that 4 strokes, the Husky included want to run below 160 f. Above and you will have problems.
Click to expand...

Mike, that temp seems a bit low to me for efficient combustion. Aren't most thermostats set at about 190 deg F?

I run Evans NPG-R, with George's Y, and typically see between 160-180 rarely momentary 200 water temps. I run temp strips on the cylinder head (just below the 'Husqvarna', can't see it while riding), one on the water pump and one on the top of the clutch cover. I frequently check the water temp while riding. I don't clutch much so it rarely exceeds the water temp. I've never felt any hot symptoms while riding, no pre-ignition or loss of power, and never boiled any coolant, Evan's boils at ~400 deg F and it expands very little and thus runs very low pressure.
 
lairpost;1687 said:
I typically see between 160-180 rarely momentary 200 water temps.
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Roughly the same temps here although I will once in a while go over 200 if its hot out and I'm crawling up steep single track, I put a 185 degree temp switch for the fan at the bottom of the radiator so really my fan does not even turn on until the water temp returning to the motor is above that.
 
The best ive ever seen a Husky run at was right around 160-165 down in Baja. In fact 165 was as high as it got all day. Stickers on the motor, and an in-hose temp guage. IMO this is the temp to shoot for. As it gets hotter, it makes less hp.

110 race fuel, custom made ''restricted'' Y, Evans, spot on jetting, opened up air box and pipe, basic race bike. TC 510.
 
Motosportz said:
it will but it will stress the cooling system. Make sure you have the up-tite Y and reinforce crossover tube or the weak link will fail.
Click to expand...

Wish I had of read this a few months ago. Bike was boiling a bit all day and blew the crossover tube. Must wire the fan to operate all the time as well.
 
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