Proper shutdown, esp hot days? - Kawasaki KLR 650 Forum
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post #1 of 19 Old 06-23-2017, 11:49 PM Thread Starter
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Proper shutdown, esp hot days?

I'm a new rider (2017 Camo). What's the best way to shut my bike down, esp when it's running at a higher temp? I live off-road, on my way home, I try to keep a steady speed. But when I actually stop, do I just shut it down? Or let it idle for a while? Either way, I keep the key on so the fan will run a bit.

Last edited by surfsup; 06-24-2017 at 12:24 AM.
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post #2 of 19 Old 06-24-2017, 06:17 AM
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I always just rode it hard and put it up wet but I did let it warm up a bit before running the crap out of it. I don't think "shut down" matters but "warm up" does.
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post #3 of 19 Old 06-24-2017, 08:58 AM
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Generation 1s always have the fan circuit "hot," even with the ignition switch OFF, the fan will run if the coolant temperature in the bottom of the radiator exceeds the thermal switch's threshold. Don't need no stinkin' ignition key on to run the fan on Generation 1s.

Actually, the fan sometimes kicks on AFTER the engine is shut down, as the heat from the cylinder head coolant conducts its way down into the lower reaches of the radiator, where the thermal switch lies . . .

That said, agree with previous post: Just shut 'er down when you park the bike.
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post #4 of 19 Old 06-24-2017, 10:35 AM
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surfsup, +1 to both responses. It is not an old fashioned diesel engine, no need to let'er idle abit after a hard run.

All the newer Kawasaki's seem to use the keyed fan circuit. And 7/16ths to 5/8ths temp gauge scale (195-245F) is the best operating temp for liquid cooled internal combustion engines.
A Thermo-Bob 2 (available from watt-man,com) will stabilize your temp gauge in that zone.

Otherwise, Ride On. And welcome to the forum.
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post #5 of 19 Old 06-24-2017, 03:38 PM
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Quote:
Originally Posted by pdwestman View Post
And 7/16ths to 5/8ths temp gauge scale (195-245F) is the best operating temp for liquid cooled internal combustion engines.
My Dodge D2500 Cummins Diesel runs steadily at 150 degrees F. Not doubting your data although curious about its source; wondering why the MOPAR/Cummins designers chose 150 degrees F. as the nominal operating point for the D2500 engine (said to be quite durable).
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post #6 of 19 Old 06-24-2017, 06:16 PM
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My Dodge D2500 Cummins Diesel runs steadily at 150 degrees F. Not doubting your data although curious about its source; wondering why the MOPAR/Cummins designers chose 150 degrees F. as the nominal operating point for the D2500 engine (said to be quite durable).
Maybe I should have said gasoline powered internal combustion engine?

Good thing the modern multi-cylinder Cummins Diesel engine has a fully functional Positive Crankcase Ventilation system on it. Otherwise its engine oil would come out looking like Cream with a little Coffee. (I wonder what it's oil temp runs at? Oil jets under the pistons?)

Times like this is when I wish knew how to do pics. Changed the engine oil 4 times (twice with Heet isopropyl alcohol mixed with 3 qts SAE30. One SAE30 rinse, then last time with my good stuff.) on a Bayou 400 liquid cooled ATV last week. Not only was the oil filler Cap full of white Mayonnaise, but so were the alternator access plugs! Also extracted the oil window and cleaned it.
Too many cold starts and short runs thru the winter, plowing snow. Every time one backs into the snow behind the atv the snow contacts the underside of the engine. Cold & more cold.

Motorcycle and ATV engines are one giant aluminum radiator, and quite effective.

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post #7 of 19 Old 06-24-2017, 06:23 PM
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Although it sounds like an lawnmower it's not one.
I always let my air cooled lawnmower idle a minute or two before shutting it down because
the exhaust valves can still be glowing red hot.
Sorta like a turbo timer in cars.

But as long as youre not climbing a big hill or running 5k+ on the tach to get home
you should be fine just shutting it off.

The manual says to give it a few minutes when cold to circulate the oil a bit which is good advice.

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post #8 of 19 Old 06-24-2017, 08:32 PM
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Originally Posted by pdwestman View Post
(195-245F) is the best operating temp for liquid-cooled gasoline-powered internal combustion engines.
Oil or coolant temperature? Source?

WattMan/Thermo-Bob?

I think someone once posted this was a SAE (Society of Automotive Engineers) conclusion (not sure whether coolant, oil, or other).

Just thinking . . . wonder what the "best" operating temperature of air is for air-cooled gasoline-powered engines . . . or their ideal oil temperature.

Last edited by Damocles; 06-24-2017 at 08:38 PM.
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post #9 of 19 Old 06-26-2017, 09:32 AM
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WARNING: If you treat her kindly, she'll leave you. A KLR is a dirty girl. She likes a little abuse. Just ride her and put her in the garage when done. She'll never complain. Give her a bath once a year and no more. She not a Goldwing kind of girl, she doesn't like fancy jewelry. She just wants to get a little dirty and play. Change her oil, lube her up good and ride her. Don't worry to much, she's not going to be your last bike. Mom and Dad may never even meet her. Just have fun with her while she's around.
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post #10 of 19 Old 06-26-2017, 09:56 AM
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I rode a couple of air cooled bikes yesterday. 75-80F ambient temps. I did not take the IR thermometer me. Instead I measured cylinder head near spark plug and oil sump temp after coming up 30mph main street 1 mile, just before turning the key off.

2009 KL250-G Super Sherpa,------------ Cyl. Head 269f------------Oil Sump 206f.
1981 KZ750-H 750 LTD,------------------ Cyl. Head 285f-----------Oil Sump 223f.

No gauge on an air cooled motorcycle to worry about, just ride 'em.

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Last edited by pdwestman; 06-26-2017 at 09:59 AM.
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