Weird temp problem on my F4i - Honda Motorcycles - FireBlades.org
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post #1 of 49 Old 01-31-2006, 6:56 PM Thread Starter
 
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Weird temp problem on my F4i

On my F4i I've had a problem with the temperature on it since I got it. It'll jump around.. Like.. it'll go 140..144..142..146..142.. etc

It'll usually stay within a few degress of where it should be but its always jumping around on the way up. I've changed the temp sensor on both the radiator and the thermostat. I've tried another set of gauges and even another ECU. It doesnt seem to affect the way the bike runs or anything but it's just annoying me.

Any ideas as to what it may be?

thanks,
nags
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post #2 of 49 Old 02-01-2006, 4:58 PM
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by nags
On my F4i I've had a problem with the temperature on it since I got it. It'll jump around.. Like.. it'll go 140..144..142..146..142.. etc

It'll usually stay within a few degress of where it should be but its always jumping around on the way up. I've changed the temp sensor on both the radiator and the thermostat. I've tried another set of gauges and even another ECU. It doesnt seem to affect the way the bike runs or anything but it's just annoying me.

Any ideas as to what it may be?

thanks,
nags
Does it do this while sitting idling, or during normal riding? As long as your radiator is properly filled (no air bubbles or anything), there should be nothing wrong. If you don't like the numbers changing, tape over it

BTW, 140's seem pretty low to me. If that is where you are running, you don't need to have the fan on all the time.
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post #3 of 49 Old 02-01-2006, 5:04 PM
 
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Re: Weird temp problem on my F4i

You expect the temp to stay exactly the same at all times?!?!
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post #4 of 49 Old 02-01-2006, 5:06 PM Thread Starter
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by gt702
Does it do this while sitting idling, or during normal riding? As long as your radiator is properly filled (no air bubbles or anything), there should be nothing wrong. If you don't like the numbers changing, tape over it

BTW, 140's seem pretty low to me. If that is where you are running, you don't need to have the fan on all the time.
At all times.. even while riding

I was just using 140s as an example as the bike was warming up while I was watching it right before this post...
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post #5 of 49 Old 02-01-2006, 5:07 PM Thread Starter
 
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Re: Weird temp problem on my F4i

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Originally Posted by RRWANTR
You expect the temp to stay exactly the same at all times?!?!
No, but I also have a 929 and 954 and I've never seen the temps jump back and fourth 5 degrees at a time for no reason
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post #6 of 49 Old 02-01-2006, 5:17 PM
 
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Re: Weird temp problem on my F4i

How quickly? My 954 and 600rr were/are always changing...
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post #7 of 49 Old 02-01-2006, 5:22 PM Thread Starter
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by RRWANTR
How quickly? My 954 and 600rr were/are always changing...
They go up 1 or 2 degrees at a time.. they never jump back 5 degrees without the fan coming on or anything
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post #8 of 49 Old 02-01-2006, 5:23 PM
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by nags
They go up 1 or 2 degrees at a time.. they never jump back 5 degrees without the fan coming on or anything
Absolutely normal (at least with every bike I've ever ridden/seen).
Why do you think it's abnormal? What's your 954 do?
edit...I just reread and you were talking about the 1 to 2 deg in regards to the 954 and 929 weren't ya? Mine will go down up and then down though as I ride depending on amount of air going through based on speed etc..
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post #9 of 49 Old 02-01-2006, 5:29 PM Thread Starter
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by RRWANTR
Absolutely normal (at least with every bike I've ever ridden/seen).
Why do you think it's abnormal? What's your 954 do?
edit...I just reread and you were talking about the 1 to 2 deg in regards to the 954 and 929 weren't ya? Mine will go down up and then down though as I ride depending on amount of air going through based on speed etc..
It's just weird that I can sit with the bike in neutral and hold the throttle at 5k... Instead of going straight up. the temp will drop down 5 degrees here and there

It's not a big deal.. The bike runs fine. I was just wondering as I've never had a bike do this before
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post #10 of 49 Old 02-01-2006, 5:33 PM
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by nags
It's just weird that I can sit with the bike in neutral and hold the throttle at 5k... Instead of going straight up. the temp will drop down 5 degrees here and there

It's not a big deal.. The bike runs fine. I was just wondering as I've never had a bike do this before
At idle dropping like that is kinda weird.
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post #11 of 49 Old 02-01-2006, 5:45 PM
 
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Re: Weird temp problem on my F4i

It would drop at first, as it is spinning the water pump quicker and thus removing heat from the engine when holding it a 5K RPM, but once the bike got fully warmed up and the water was all hot without air moving through the radiator it would rise rather than fall.
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post #12 of 49 Old 02-01-2006, 5:52 PM
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by nags
It's just weird that I can sit with the bike in neutral and hold the throttle at 5k... Instead of going straight up. the temp will drop down 5 degrees here and there

It's not a big deal.. The bike runs fine. I was just wondering as I've never had a bike do this before
Probably running into the point where the thermostat opens and closes. It might open and close (chattering) a little until the water warms up enough to keep it open. A slug of cold water can close the thermostat again until it heats up again. I've seen this a couple times under certain conditions; definitely not something to be worried about ... just don't look at the dash until it is warm
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post #13 of 49 Old 02-07-2006, 3:14 AM
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by gt702
Does it do this while sitting idling, or during normal riding? As long as your radiator is properly filled (no air bubbles or anything), there should be nothing wrong. If you don't like the numbers changing, tape over it

BTW, 140's seem pretty low to me. If that is where you are running, you don't need to have the fan on all the time.
140 seems crazy low to me...My F4i is usually mid 180's, but will hit 220(Fan engages about then!) at a long signal or just while parking in my office garage.

Remember, that little sucker is pumping out some RPM's, and it's a lot happier in the wind!

I vote for the tape!
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post #14 of 49 Old 02-08-2006, 11:40 AM Thread Starter
 
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Re: Weird temp problem on my F4i

Ok, so I just rode the bike for the first time and the temp is jumping like 20 degrees at a time.. it'll go from 190 to 212 and them back down to 185 all within 5 seconds
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post #15 of 49 Old 02-09-2006, 10:04 PM
 
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Re: Weird temp problem on my F4i

Quote:
Originally Posted by nags
Ok, so I just rode the bike for the first time and the temp is jumping like 20 degrees at a time.. it'll go from 190 to 212 and them back down to 185 all within 5 seconds
The bike is just trying to remind you that you have a Honda nut roaster which you are sitting apon. Just dont hope it will keep you warm on a cold night ride b/c that will never happen. It just like to burn you balls when it is hot out.

When it goes from 212 back down to 180 are you..
1. riding the bike so air is passing over the rat and cooling things off?
or
2. the fan is kicking on and cooling things down?

If it is either one of those dont worry about it b/c it is completly normal. My bike will get up to 225 before it comes back down.
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