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Discussion Starter · #1 ·
Long explanation, please forgive me.

It finally got cold here and I've been riding the highway in 40degF temps the temp gauge would 'barely' see 1/4(I don't like that, plus it's not good for the engine to run that cool).

I'm from AZ and ride when it's 110degF so ya, 40degF is 'cold' for me. I also have a lot of scare tissue from tons of surgeries that's blocking blood flow.

By the time I make a quick stop at a store and return to the bike it would be nearly completely cooled down and I'd have to wait for it to register on the gauge again before hitting the road(I always let my bikes warm up). Note: I do NOT have a Tbob on this bike.

I decided to experiment with a typical mod that is often seen in the 'big rig' community during cold weather. After making some basic BTU calcs I came up with this, it blocks exactly (1/3) of the radiator surface area.
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I realize it looks basic but keep in mind it's experimental. There is a reason it's on the bottom.

This simple mod allows the bike to now come up to 1/2 on the temp gauge when riding in the cold (where I like it to be for efficiency sake among other reasons) Same goes for hot summers, I like it to run right about 'half' on the gauge.

The engine obviously maintains it's heat longer after shutting it off to run into a store. I haven't had to wait to let it warm back.

Coming up the mountain on the way home it still sits at HALF on the gauge.

It's not good for the engine to be loaded hard while running 'too' cool.

I'd also like to point out that I don't even have to 'top off' the oil between changes on this bike(doesn't burn a drop) even after 6hrs of 4500-5000rpm on the highway.

Not trying to create drama, just thought I'd share my 'simplistic' solution. If it works for 'semi trucks' it could too work for the KLR.

Let me be clear, I still believe having a Tbob is the ideal setup. I just don't have one at this point. I also believe that 'always' letting the bike 'warm-up' before getting on it has protected this engine.

Thanks for reading my long post, best wishes and ride hard/often. (y)
 

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Discussion Starter · #10 ·
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Discussion Starter · #18 ·
New here with a newly purchased 2022. In attempts to decipher all the info. being feed through the fire hose, I've come up with a question about the operating temperature that I'm sure has been asked a 100 times, so please be patient if it has.

In regards to the T-Bob, wouldn't a simple change of the thermostat to one that operates in a higher temperature range (180 degree F), not solve the cold operating temperature problem?
In short, no. This is because the OEM cooling is not a bypass system. It deadheads behind the thermostat until it opens whilst allowing the water in the radiator to 'over cool' which then 'shocks' the cylinder once it opens and allows coolant to flow. That's the basics but I think you get the idea. Best wishes
 

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Discussion Starter · #19 ·
Haha, Dave beat me to it. (y)
 
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