Thermo-Bob and Doohicky question - Kawasaki KLR 650 Forum
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post #1 of 10 Old 10-29-2012, 12:50 PM Thread Starter
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Thermo-Bob and Doohicky question

Hey Guys

The 2008 KLR 650 that I just bought has a Thermo-Bob installed on it. I have read that this is a Good Thing and could extend the life of my engine. If so I'm all for that.

But I notice that a lot of times the temp guage hardly lifts off the peg when I'm riding in cooler (50 ish) weather. Is this the norm? I checked my coolent tank and it is right between the full and add marks.

Just wondering as I don't want to have to worry about my new bike.

Oh, and how important is it to do a doohicky mod on a 2008? My 2006 has one but did not know if the newer ones needed one or not.

All replies appreciated!
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post #2 of 10 Old 10-29-2012, 01:31 PM
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I was just thinking yesterday there hadn't been any TB Q's lately. The Thermal Robert (as dubbed by Cheap) should make it so your temp guage sits right in the middle. Mine gets to the top of the screw in the center if it is really hot, and rests at the middle of the screw usually. So, If you're saying you have a TB and the needle isn't coming up to the middle, it ain't working.

On the Gen2 bikes, the doohickey is better, not great, but I would guess adequate, but the springs are jacked. My spring was floppy loose. So, you need to get in there with a torsion spring (preferabely) or a better spring. If you aren't poor like me, put a new doo in. Eagle Mike does make nice stuff. If you're watching your wallet, change the spring.




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post #3 of 10 Old 10-29-2012, 02:03 PM
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Ditto. My Thermo-Bob allows the tempo gauge to come up just about to center on my Gen 1 KLR. Without it the temp gauge hardly moved. You should check it out. Your temp gauge should be moving.

As to the Doohickey. Like Lockjaw said at least change the spring. However to change it you have to remove the doohickey anyway so you may as well put in the EM doohickey and be done.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #4 of 10 Old 10-29-2012, 08:14 PM Thread Starter
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Thanks for the replies. I talked to someone else today that was familiar with the Thermo-Bob and he said that they use an automotive type of thermostat and that it sounded to him like there was one in there was was possibly opening too soon, like maybe 165 degees or so. Any opinion on that?
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post #5 of 10 Old 10-29-2012, 09:14 PM
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Watt-Man, the thermo-bob creator, ships all Thermo-bobs with a 195 degree thermostat unless you ask for a 180. He does use an automotive thermostat but not sure on what the application is.

You can contact him on his site here:

http://shop.watt-man.com/main.sc

He is very helpful and responds quickly to questions. I'm guessing that your thermostat may be stuck open.


.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #6 of 10 Old 10-30-2012, 07:09 AM
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Me Thermo-Bob in me 08 has the temp guage needle running about 1/2 covering the black screw on the guage face, in all ambient temps from -19C (don't ask)... up to +36C. At dead slow speed the needle will rise above the screw a bit before the fan starts. If I remember the thermostat is a common Ford part. One way to diagnose is with the bare fingers on the side of the cylinder after the engine has run for several minutes. Does it feel like 195F? or more like 140F?

I installed an Eagle Mfg doohickey kit with the radial spring at 7500km on my 08. The parts looked ok, but the OEM tension spring was completely slack not able to take up the balancer drive chain tension like it is supposed to.

Last edited by Slowpoke; 10-30-2012 at 07:24 AM.
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post #7 of 10 Old 10-30-2012, 07:24 PM Thread Starter
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Thanks for the replies, guys.

I sent an email to Bill at Watt-Man.com and he kindly wrote back saying that it was more than likely a sending unit issue than it was the thermostat and told me how to check it and it seems that he was right. I have to chase down why it's reading low but was relieved to know that the unit itself was working OK. Oil temp too low is worse than oil temp too high I think.

I really don't know where to start looking but it will give me something to do for when cold weather gets here which is right around the corner.
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post #8 of 10 Old 11-25-2012, 09:19 PM
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My 2009 has the doohickey. Waiting for my therm bob to come in.
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post #9 of 10 Old 12-01-2012, 08:44 PM
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Put in my thermo bob last night and tested it today. The outside temperture was 38 degrees and my temp gauage stayed between 1/3 and a lillte below 1/2 for the whole ride. This thing works for sure.
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post #10 of 10 Old 12-01-2012, 11:37 PM Thread Starter
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Quote:
Originally Posted by vanslam View Post
Put in my thermo bob last night and tested it today. The outside temperture was 38 degrees and my temp gauage stayed between 1/3 and a lillte below 1/2 for the whole ride. This thing works for sure.
I'm thinking that it may just be something as simple as a bad ground as to why mine is acting goofy. Sometimes the gauge will read OK and sometimes the needle will not even lift off the peg so for sure, it aint the Thermo-Bob itself.

I will find what it is and when I do I will let everyone know. As long as my cooling system is working OK that's the main concern. I can worry about the gauge a bit later because with winter almost here my bike is not going to be ridden that much for a while anyway.
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