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post #1 of 16 Old Jun 15th, 2010, 1:45 pm Thread Starter
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over heating K1200 LT

HELP!!! My K 1200 has 80K on it and the other day coming home from a short trip (110 miles) the guage started moving to the red whenever I set still in traffic for any length of time. It got to the red mark for a brief second before the fans turned on and slowly started to cool down. I thought i was going to have to turnit off and sit on the side of the road but it coole denough to keep going. My quetion is "could this be the sensor for the gfans not working or is something more sinister going on?" When I got home I used a little water mist into the radiator and my bike cooled down fast, the guage went under my normal riding temp so I don't think it's the water pump. Any help is greatly appreciated.

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post #2 of 16 Old Jun 15th, 2010, 2:03 pm
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Re: over heating K1200 LT

Warm day...

But my '05 handled ok.. When did you last do coolant change?

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J.M.J...
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post #3 of 16 Old Jun 15th, 2010, 2:10 pm Thread Starter
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Re: over heating K1200 LT

Last fall, I changed the radiator cap when I flushed the system. 50/50 mix

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1973 Yamaha 750 (R.I.P.)
1980 Yamaha 550 SECA (R.I.P.)
1999 Kawasaki ZRX 1100 (R.I.P.)
1984 HONDA 200 ATX
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post #4 of 16 Old Jun 15th, 2010, 2:45 pm
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Re: over heating K1200 LT

Did bike really feel hot?

I wonder if you have a "failing" sensor...? If you have access to an infrared temp sensor, that would be a quick check..

http://www.harborfreight.com/infrare...ter-93984.html

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post #5 of 16 Old Jun 15th, 2010, 2:51 pm Thread Starter
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Re: over heating K1200 LT

can you please explain the last post in simple terms? I don't follow what to measure to determine the failure of the heat sensor relay to the fan.

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1973 Yamaha 750 (R.I.P.)
1980 Yamaha 550 SECA (R.I.P.)
1999 Kawasaki ZRX 1100 (R.I.P.)
1984 HONDA 200 ATX
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post #6 of 16 Old Jun 15th, 2010, 10:54 pm
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Re: over heating K1200 LT

Assuming that both fans were working when it was heating up...

Radiator cap... If it will not hold the 14 to 16 psi (pounds per square inch) the coolant will reach the boiling point at lower temperatures. In other words: the coolant under pressure has a higher boiling point. Lookie here for an simple explanation. If the coolant has not been changed in the last two years you should do it now with a new cap. Then enjoy the riding season without worry...

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post #7 of 16 Old Jun 16th, 2010, 7:56 am
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Re: over heating K1200 LT

Sent a PM...

If you need an extra set of eyes on the problem ring me up.

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post #8 of 16 Old Jun 17th, 2010, 1:35 pm Thread Starter
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Re: over heating K1200 LT

Quote:
Originally Posted by cfell
Sent a PM...

If you need an extra set of eyes on the problem ring me up.
Thanks I will give you a call this weekend if possible.

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1973 Yamaha 750 (R.I.P.)
1980 Yamaha 550 SECA (R.I.P.)
1999 Kawasaki ZRX 1100 (R.I.P.)
1984 HONDA 200 ATX
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post #9 of 16 Old Jun 17th, 2010, 1:36 pm Thread Starter
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Re: over heating K1200 LT

Quote:
Originally Posted by ErnieA
Assuming that both fans were working when it was heating up...

Radiator cap... If it will not hold the 14 to 16 psi (pounds per square inch) the coolant will reach the boiling point at lower temperatures. In other words: the coolant under pressure has a higher boiling point. Lookie here for an simple explanation. If the coolant has not been changed in the last two years you should do it now with a new cap. Then enjoy the riding season without worry...
the fans came on only after the temp guage went in the red.

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1973 Yamaha 750 (R.I.P.)
1980 Yamaha 550 SECA (R.I.P.)
1999 Kawasaki ZRX 1100 (R.I.P.)
1984 HONDA 200 ATX
1999 Kawasaki ZX 9 R
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post #10 of 16 Old Jun 17th, 2010, 5:13 pm
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Re: over heating K1200 LT

Quote:
Originally Posted by baurcorp
the fans came on only after the temp guage went in the red.
I'm currently on my second LT. It's a 2002. The first was a 2000. Both of the LTs would turn the cooling fans on just when the temp needle touches the red zone. Then the needle would go down to the 3/4 range where fans would stop and bikes will heat up again. That's the cycle for both the bikes and neither one showed symptoms of overheating. This would happen on heavy stop and go specially on a warm day. Also happened twice when I was stuck following a slooooooooow long line of trucks or cars travelling upwards westbound on Hwy 108.

Big drop in stress when I got used to this nature of the beast.

JMTCW

Last edited by DaFlake; Jun 17th, 2010 at 5:20 pm.
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post #11 of 16 Old Jun 18th, 2010, 9:04 am
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Re: over heating K1200 LT

Quote:
Originally Posted by DaFlake
I'm currently on my second LT. It's a 2002. The first was a 2000. Both of the LTs would turn the cooling fans on just when the temp needle touches the red zone. Then the needle would go down to the 3/4 range where fans would stop and bikes will heat up again. That's the cycle for both the bikes and neither one showed symptoms of overheating. This would happen on heavy stop and go specially on a warm day. Also happened twice when I was stuck following a slooooooooow long line of trucks or cars travelling upwards westbound on Hwy 108.

Big drop in stress when I got used to this nature of the beast.

JMTCW
Almost the same here. Only one LT. It's a 2002 and it is plenty warm in South Texas. My temp guage will just start to kiss the red mark when the fans kick in and the temp drops down to 3/4 but once I start moving out of traffic, they will drop back to the 1/2 mark.

"BONES" <///><
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post #12 of 16 Old Jun 18th, 2010, 12:48 pm
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Re: over heating K1200 LT

FWIW:


Here are the specifications for the cooling system.


Thermostat opens @ 85 (185)
Fans Kick in @ 105 (221) (usually very near red on the gage)
High temp light on @ 115 (239)
C (F)

John
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post #13 of 16 Old Jun 18th, 2010, 2:25 pm
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Re: over heating K1200 LT

Went to lunch in Austin.

Fans kicked on while waiting at second of Austin's looooooong traffic lights.. bar kept climbing... but.. stabilized.. yes, fans kicked... and held temp eventually.

Once moving, things improved.

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post #14 of 16 Old Jun 26th, 2010, 5:01 pm Thread Starter
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Re: over heating K1200 LT

yeah, I was in my driveway trying out the fans, they never kicked on and it went to red. I cooled it off with a little water mist and it immediately went down past the middle mark. I believe the fan relay is bad. I bought one and now don't know where the relay box is located. I am pulling off skins as I post but don't really know which ones to pull of. do I have to strip off all the skins? I hate to be at this all afternoon to replace a $15.00 part.

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1973 Yamaha 750 (R.I.P.)
1980 Yamaha 550 SECA (R.I.P.)
1999 Kawasaki ZRX 1100 (R.I.P.)
1984 HONDA 200 ATX
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post #15 of 16 Old Aug 3rd, 2010, 9:05 am
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Re: over heating K1200 LT

Did you ever find where the relay goes?

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post #16 of 16 Old Aug 3rd, 2010, 9:21 am
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Re: over heating K1200 LT

Ha ! Talk about a thousand dollars labor and a fifteen dollar part...

The relay box is under the fuel tank which must be removed in order to change out the relay..

sorry...

All the tupperware (both sides ) has to come off. then the stingray.. Then the seat and mounting bracket then the fuel tank.. the Relay box is on right side..

Have fun.. It should take about two hours to get to it... For a novice.. About an hour if you're experienced with removing all the stuff to get to it...If you have plastic quick disconnects for the fuel tank. Change them out too before they leave you stranded or worse on fire...

Have fun..

John

P.S I'd stick my finger in the outlet and see if I could turn the fans by hand at some point.
They will eventually sieze up if never used ....

P.S.S. Might want to change out the brake light relay while you're in there. Maybe air filter, fuel filter, Cause you're gonna be right there......

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