Overheating And Shutting Down - Kawasaki KLR 650 Forum
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post #1 of 22 Old 05-30-2016, 10:18 AM Thread Starter
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Overheating And Shutting Down

So... I just got my KLR a few weeks ago (first bike I've ever owned just got my licenses last week, loving it so far) and I took it on some trails yesterday. I was working the bike pretty hard as the trails were tough and was not going much above idle speed. After a while I noticed the bike was starting to get hot (the temperature gauge was about 3/4 of the way up, significantly above the half way point, is this normal?) . I stopped the bike (fan was running) and after sitting for about a minute it just shut down. I let it cool, started it up and rode off right away making sure I was going fast enough to cool the engine, after that it worked fine. Coolant gauge indicated coolant level is NOT low.
Any ideas what could be wrong? Thanks in advance sorry for the lengthy post

TLDR: Bike was being put to work, got hot, and shut down on it's own.
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post #2 of 22 Old 05-30-2016, 10:34 AM
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What year?

It will get a bit hot if running slow on trails. Not sure what the issue is but others will chime in soon. I have had mine peggeg for heat since my fan fuse was blown but it did run OK.

I think the fix would be the thermo bob but can't say for sure. I just put one on but have not tested it yet.

'01 KLR 650, '09 Suzuki DL650, '08 Suzuki Bandit 1250, '16 CRF1000L, '09 KLX 250s
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post #3 of 22 Old 05-30-2016, 11:16 AM
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You mean the fan shut off right? If so I'd assume that after a minute of sitting there, not running, with the fan running that the thermostatic switch was satisfied.

Dave
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post #4 of 22 Old 05-30-2016, 11:58 AM
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Sounds like completely, totally, authentically, typical normal KLR650 cooling system operation; it's WORKING!

BTW, the temperature gauge doesn't show your coolant level; checked by removing radiator cap and visual inspection of level, and by observing meniscus compared to FULL mark on coolant reservoir.

You're not overheating in my view, unless the coolant is boiling and the temperature gauge needle moves to the extreme red zone; YMMV.

Fear not; enjoy riding your bike!
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post #5 of 22 Old 05-30-2016, 04:52 PM
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Quote:
Originally Posted by frostbitevinnie View Post
.................
I think the fix would be the thermo bob but can't say for sure. I just put one on but have not tested it yet.
Thermo-bob does not increase the cooling capacity of the system. It just smooths out temperature fluctuations cause by the thermostat opening and closing. Once the engine is hot/warm enough for the thermostat to stay open, the T-bob makes no difference and the temperature just floats with the load the engine puts on the cooling system.
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post #6 of 22 Old 05-30-2016, 05:07 PM
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Quote:
Originally Posted by Damocles View Post
Sounds like completely, totally, authentically, typical normal KLR650 cooling system operation; it's WORKING!

BTW, the temperature gauge doesn't show your coolant level; checked by removing radiator cap and visual inspection of level, and by observing meniscus compared to FULL mark on coolant reservoir.

You're not overheating in my view, unless the coolant is boiling and the temperature gauge needle moves to the extreme red zone; YMMV.

Fear not; enjoy riding your bike!
Yes, I agree with Damocles about everything except observing the meniscus in the radiator reservoir. While I am sure there is one it appears as a flat line and I just check to make sure the coolant level is visible in the view window of the reservoir.
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post #7 of 22 Old 05-30-2016, 05:43 PM
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Agree, the Thermo-Bob does NOT enhance cooling; the developer makes no such claim, although some of his customers do. After the thermostat opens, engine cooling is at the mercy of coolant circulation and radiator/engine air flow, Thermo-Bob or not.

For literary clarity, substitute, "upper level of coolant," for "meniscus," in my post above. Or, perhaps, edit as: "Meniscus, if it had a meniscus."
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post #8 of 22 Old 05-30-2016, 06:19 PM
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Another vote for the Thermo-Bob. My KLR would run cool on the highways and hot in slow city traffic and on trails. Once I installed the Thermo-Bob 2, my bike runs at 190 in all conditions...except for the case that Damocles warns you about. Check the coolant level before your rides, especially the tougher ones.

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post #9 of 22 Old 05-30-2016, 06:48 PM
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Quote:
Originally Posted by dennisarthur View Post
So... I just got my KLR a few weeks ago (first bike I've ever owned just got my licenses last week, loving it so far) and I took it on some trails yesterday. I was working the bike pretty hard as the trails were tough and was not going much above idle speed. After a while I noticed the bike was starting to get hot (the temperature gauge was about 3/4 of the way up, significantly above the half way point, is this normal?) . I stopped the bike (fan was running) and after sitting for about a minute it just shut down. I let it cool, started it up and rode off right away making sure I was going fast enough to cool the engine, after that it worked fine. Coolant gauge indicated coolant level is NOT low.
Any ideas what could be wrong? Thanks in advance sorry for the lengthy post

TLDR: Bike was being put to work, got hot, and shut down on it's own.
dennisarthur,
You may learn to 'Ignore' some of Damocles postings, we don't know why he purposely tries to confuse the issue sometimes!

A stone stock KLR650 will run perfectly "Happy" at 9/10ths scale of the temp gauge. If it truly gets 'into' the RED Zone, then it is time to shut it OFF and take a break.
Perfectly normal for the fan to be running continuously at 'trail speeds' and for 1-3 minutes after 'key OFF' if IT is a Gen1.
(I think a Gen2 fan shuts OFF when KEY is Off. I 'hate' that system.)

A 'Thermo-Bob' will RAISE your normal Operating Temperature to the Middle of Temp gauge. Which is actually a good thing. 190-200 degrees F., normally! Keeps your oil cleaner!

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
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post #10 of 22 Old 05-30-2016, 06:59 PM
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Originally Posted by pdwestman View Post
dennisarthur,
You may learn to 'Ignore' some of Damocles postings, we don't know why he purposely tries to confuse the issue sometimes!
I'd point out . . . some are easily confused!



-------------------

Brief, irrelevant anecdote; perhaps related obliquely to the topic of, "confusion." On a ride with three companions (one on a NEW Honda Africa Twin, a BMW 650 (800 cc), a KLR650, and my KTM 690, we stopped at a diner for lunch.

I asked the waitress what kinds of burgers they served, specifically, if they had buffalo burgers on the menu.

She replied, "No buffalo burgers, but we have a bison burger."

"Great!" I said, "I'll have a bison burger!"

I did, and . . . it was delicious.

---------------------------------------

In case anyone wants to know what a Honda Africa Twin looks like (this one had 30 miles on the odometer):


Last edited by Damocles; 05-30-2016 at 07:20 PM.
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