919 running cold - Wrist Twisters
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post #1 of 10 Old 04-13-2018, 06:44 PM Thread Starter
Tirone
 
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919 running cold

so my new 03 919 runs and starts fine. Warms up to normal heat on the temp gauge but when I am running down the road at 45 F the temp drops down to barely registering. when I first rode it it was cold out 28F but even at 50-60f it runs cold. stuck open thermostat? any idea what thermostat it would be?

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post #2 of 10 Old 04-13-2018, 07:40 PM
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Quote:
Originally Posted by samuelc View Post
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so my new 03 919 runs and starts fine.

2
Warms up to normal heat on the temp gauge but when I am running down the road at 45 F the temp drops down to barely registering. when I first rode it it was cold out 28F but even at 50-60f it runs cold.

3
stuck open thermostat?

4
any idea what thermostat it would be?
1
A great bike to have!

2
Perfectly normal for a 919, although I'd expect the needle to be at least a tad higher @ 50 -60 F ambients at low power levels. And if you live in a damp area, the humidity will cause the bike to run a touch cooler for any given ambient.

3
Doubtful.
Also, counter to a stuck stat possibility is the fact you can even warm it to the normal temp zone before it starts to drop once riding a bit.
You can remove it and check it on the stove in a pot of water if you want to be absolutely sure.

4
180 F if I remember correctly.

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post #3 of 10 Old 04-13-2018, 07:49 PM
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Ronayers.com have the thermostat listed. $36, I think.

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post #4 of 10 Old 04-13-2018, 08:09 PM
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Partzilla have them at $33. Temp sensor for $30.

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post #5 of 10 Old 04-14-2018, 01:48 AM Thread Starter
Tirone
 
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Thanks for the info. I will keep an eye on it as the temperature gets higher here in Maine.

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post #6 of 10 Old 04-14-2018, 11:56 AM
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If you have concerns that the thermostat isn't closing completely it's an easy task to remove the thermostat and check if it's working properly. All you need to do is prop the gas tank up and drain some coolant in order to remove the thermostat. Just a visual will tell you if it's not closing and then, as mcromo44 said, just a thermometer and a pot of water on the stove will tell you at what temp it's opening and closing. The service manual shows this in detail.
A hint - I'd wait till the wife is out of the house to do the 'pot of water on the stove using a cooking thermometer' thing.

Good luck
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post #7 of 10 Old 04-15-2018, 06:36 AM
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You see the very tiny break in the line just above C in the image. That is where the needle usually set on mine.
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post #8 of 10 Old 04-15-2018, 01:52 PM Thread Starter
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Well, it sounds like mine is normal then. Guess I will leave it alone for now.

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post #9 of 10 Old 04-18-2018, 05:38 PM
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No worries! My 2007 919 has done this since I purchased it new. At first it concerned me, but as several have said, it’s the nature of the beast!👍


"First You Fly, Then You Die!"--Los Lobos
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post #10 of 10 Old 04-19-2018, 05:02 AM
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Been riding mine to work in the morning and it does the same thing. Only time it jumps up is if the temp outside is 70+. Cool running bike and I love it, my gixxer used to scare the crap out of me for running close to the top.

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