Aftermarket Thermostat? - Kawasaki KLR 650 Forum
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post #1 of 94 Old 11-02-2015, 03:01 PM Thread Starter
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Aftermarket Thermostat?

Anyone know of a thermostat that will fit a KLR housing other than the stock one?
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post #2 of 94 Old 11-02-2015, 04:19 PM
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Yes.
But it is not recommended to install them with out installing a proper water re-circulating bypass.

Normk might supply you a 195 thermostat and instructions on how to install a bypass the hard way/permanent way/scary way. For him it is easy-peasy, it scares the pea-outa' me.

I find it better for most people, including me to purchase the Thermo-Bob 2 from watt-man at Welcome . I recon one could purchase just a replacement T-Bob2 stat from watt-man?

pdwestman
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post #3 of 94 Old 11-02-2015, 05:58 PM Thread Starter
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I must be missing something....why woulden't a stat change do the trick by itself? It works in tractors cars trucks etc. and my old jeep so it should work in a KLR.

I understand the thermo bob keeps the temp steady in the 210 range on most days so a 195 thermostat alone should be better than the stock one to bring the temps up. I have one of his gauge overlays and my bike is always running cold in the winter even in fla. so you guys up north even colder. I have used cardboard etc. to block off rads in cold weather even with a higher temp stat on sub zero days even on bikes...maybe i will try that on this bike.

Maybe someone who owns or works in a part store could do some research to find a car stat that is the same size with a higher temp. or has Watt.Man already done that?
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post #4 of 94 Old 11-02-2015, 06:45 PM
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Drifter,
Click on the blue hi-lighted "Welcome", in the post above yours.
Read and study watt-mans temperature graphs.

I said, not recommended.
But I do know a High School small gas engines teacher who is doing as you wish to.
To each our own, sometimes.
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post #5 of 94 Old 11-02-2015, 08:34 PM
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Quote:
I said, not recommended.
"Not recommended," by whom?

How does a higher-temperature (195 degrees F.) thermostat in an otherwise stock (no radiator bypass) cooling system could cause any maintenance issues?

Thermodynamically, a very similar effect to blocking part of the radiator airflow (as with cardboard, etc.), I'd think.

A "hotter" thermostat won't stabilize coolant temperature like a ThermoBob, but . . . should raise nominal coolant temperature, seems to me.

I have a "Normk" model higher-temperature thermostat; may drop it in just to see what happens. Please warn me of any danger, describing the failure/malfunction mechanism. Thanks!

[Further thanks to Normk for obtaining the higher-temperature thermostats and allowing me to purchase one.]
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post #6 of 94 Old 11-02-2015, 08:44 PM
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Quote:
Originally Posted by pdwestman View Post
............Welcome . I recon one could purchase just a replacement T-Bob2 stat from watt-man?
Watt-man will sell you a 195 deg. F. t-stat and o-ring for the T-bob 2 which fits the stock t-stat housing. I bought one from him. Although, I had previously fabricated and installed a bypass for an application unrelated to temperature control, so mine is sort of a T-bob 1-1/2.
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post #7 of 94 Old 11-02-2015, 09:49 PM
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Originally Posted by Damocles View Post
"Not recommended," by whom?

I have a "Normk" model higher-temperature thermostat; may drop it in just to see what happens. Please warn me of any danger, describing the failure/malfunction mechanism. Thanks!

[Further thanks to Normk for obtaining the higher-temperature thermostats and allowing me to purchase one.]
#1,
By Bill, himself. By Normk. By me. Do as you wish!

#2,
Like I told the H.S. teacher, it may take a few 10's of Thousands of miles to 'see the difference'. Compared to a proper bypass system.
How long are you keeping yours?? Do as you wish.

#3,
Normk's source is the original North American Continent Source.
He passed the info to Watt-man. Who would have done it with the original size thermostat if he could have, at that time!!!!!

pdwestman
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Still riding my 1987 KL650-A1. 85,000+ miles & counting
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post #8 of 94 Old 11-03-2015, 05:57 AM
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Thanks for the answers, Paul; I appreciate your patience and civility!

Once more, I regard highly the competent design and manufacture of the Thermo-Bob, and its extensive testing program. Just wondered, short of a Thermo-Bob, what harm a higher-temperature thermostat would cause, and how.

Thanks again for your consideration.

My riding partner, with now 65,000 miles on his '08 KLR650, still loves his Thermo-Bob!
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post #9 of 94 Old 11-03-2015, 07:44 AM Thread Starter
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GoMotor, do you have a gauge overlay if so what temps are you running on the road after the stat change and 1/2 bob job?

Damocles, let us know if you notice any temp change if you decide to switch the stat. Are you going to do it this weekend?

Sounds like Normk has done the work and found one, anyone know what they came out of? Watt-Man might be getting more of my money...

My riding a KLR tens of thousands of miles are long past besides i could not carry that much Rotella!
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post #10 of 94 Old 11-03-2015, 08:37 AM
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Won't be this weekend, Drifter; will see about raising the priority. Fully experimental; no known problems with the stock cooling system; hope the higher-temperature thermostat doesn't introduce any, whatever they may be.
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