shayne
Omnipresent
1998 Blueprint
Posts: 8,639
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Post by shayne on Jan 12, 2012 16:57:46 GMT 10
Last time I rode the VFR I noticed the thermo fan was not working properly. It was making a racket, so was rubbing on something. I had done a big service on it, and had removed the fairing and radiator overflow in the process, so I figured I had done something wrong during bolting it back up. I had a good look when I got home in case something had got stuck in there. I know rocks get in there occasionally on the VTR. No luck though, it spun round ok, just catching on one spot. Stuffed around for a while before parking it. Figured I would have to take the bloody faring off to do it properly. So today I thought I should sort it out. Cover off, moved the bike, battery charger off, and up on the stand. Got some tools out that I would need, and grabbed the torch for a closer look. Before doing anything I stuck my head under it again to look at the fan. Human nature being what it is, I could not help myself from spinning the fan one more time to see why it was sticking. I had only spun it around about 100 times already.  And a bloody rock fell out. So I put it away. Lucky I didn't pull the fairing off first!  |
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Post by paulbassett on Jan 12, 2012 17:06:03 GMT 10
Are you running a VTR fan on it or the OEM one?
I have a VTR one on mine.
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Mattjin
True Stormer
I don’t think you are stupid. You just have a bad luck when thinking.
Posts: 1,168
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Post by Mattjin on Jan 12, 2012 21:25:19 GMT 10
You rock Shayne!!
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shayne
Omnipresent
1998 Blueprint
Posts: 8,639
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Post by shayne on Jan 13, 2012 15:25:05 GMT 10
Are you running a VTR fan on it or the OEM one? I have a VTR one on mine. I have the standard fan on it Paul. Works well. In traffic I flick on my bypass switch, but that is rare nowadays. Why do you have a VTR fan on there? Does it move more air? |
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Post by paulbassett on Jan 13, 2012 19:41:03 GMT 10
Are you running a VTR fan on it or the OEM one? I have a VTR one on mine. I have the standard fan on it Paul. Works well. In traffic I flick on my bypass switch, but that is rare nowadays. Why do you have a VTR fan on there? Does it move more air? No, its because the VTR fan has the opposite pitch to the VFR fan, which sucks air from the outside of the radiator and blows it inwards towards the motor. This is against the direction of natural airflow through the radiators and works well if stationary but not so well if moving at any sort of reasonable speed. The VTR fan blows air in the same direction as the natural airflow and works much better if you are moving. The downside is that it doesnt work quite so well if stationary because the air inside the fairing is preheated by the engine and headers etc, but I'm rarely stationary so it suits me, combined with an override switch. |
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shayne
Omnipresent
1998 Blueprint
Posts: 8,639
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Post by shayne on Jan 15, 2012 7:39:53 GMT 10
Well there you go, I never new that.
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Post by Fozzy Bear on Jan 16, 2012 18:21:08 GMT 10
Sounds logical to me but you sure that's the natural airflow?
Those engineers at Honda are clever little buggers and it seems odd that they would miss something like that.
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Post by paulbassett on Jan 16, 2012 20:40:56 GMT 10
Sounds logical to me but you sure that's the natural airflow? Those engineers at Honda are clever little buggers and it seems odd that they would miss something like that. Definitely sure. The natural airflow is in through the front and out through the sides, just like the Firestorm. I dont think it was a mistake. Their reasoning was probably that the only time you would need the fan was if stationary or moving very slowly, in which case the fan would easily overpower the natural airflow, and the air would be cooler on the outside. Its a bit different when you get up to about 60 or over and the thing doesnt cool down much at all until the fan stops because the airflow is virtually stalled. Fitting the VTR fan doesnt really make much difference to the cooling when stationary, but once you get moving it makes a big difference, and it just makes better sense if you are moving to enhance the natural airflow rather than fight it, and using a manual override allows you to keep it cool all the time. It is odd that Honda should produce 2 bikes with similar configuration, ie side mounted radiators and have one with a fan that blows and the other a fan that sucks. |
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shayne
Omnipresent
1998 Blueprint
Posts: 8,639
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Post by shayne on Jan 17, 2012 7:35:43 GMT 10
Exactly. Have to wonder why the change if the previous method works better.
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jk
True Stormer
2000 VTR SP1; 2006 Daytona 675
Posts: 1,179
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Post by jk on Jan 20, 2012 23:25:16 GMT 10
Could mount both fans.....blow and suck at the same time.... lets ponder that for a moment....  |
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shayne
Omnipresent
1998 Blueprint
Posts: 8,639
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Post by shayne on Jan 22, 2012 8:36:56 GMT 10
Could mount both fans.....blow and suck at the same time.... lets ponder that for a moment.... I think the cold down there has got to you Justin. |
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