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Discussion Starter #1
hey guys i was wondering if anyone is running a race/track cbr without a fan. i am asking because i am not sure but i just found out i do not have a fan on my track bike.i am going to get one, but i was just wondering why would some one take the fan off. also what is the temperature the cbr runs on. thanks
 

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The fan is really there to move air across the radiator when you've been sittin there idling for too long which is usually not an issue on a race bike.
 

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if your bike is running 153 degrees on the track then you need to put some tape across the radiator. Use enough tape to get it between 170-180, that is normal temp for max power. 153 is not warm enough. if its a track day bike then i wouldnt buy a fan i know alot of people dont run fans. If there is a delay you will have to turn it off so it doesnt overheat
 

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i would highly recommond water wetter to keep it that cool without a fan, but im sure you already knew that/have it in your coolant.
 

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All the prior posts list good reasons to take it off, there's one more : your bike will run cooler at speed without it. On a street bike it's a necessary trade off, not on a race bike. You'll get much more volume through it this way. Also, as someone stated earlier, it's one less thing to go through your radiator in a crash.
 

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Discussion Starter #14
proze said:
Holy crap, how can you be running at 153?! Are you riding in snow or something?!
no i am not running 153, when i started the bike i left on for 5 min. and it read 153 so i was wondering what is the normal temp for cbr. lol
 

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On the HRC wiring loom for the RR there is no wiring for the fan so I took mine off. The fan might help cool a road bike sat in traffic but you wouldn't want to be riding flat out with it permanently on. I think when riding quickly air flows through the radiator faster than the fan could achive anyway.

Even with no fan my RR ran too hot on track for best with a standard engine (95 C, 203 F), now the motor has been tuned I'm putting a race radiator on it. If I have to use tape to get it up to temp that will be preferable to it turning the extra power into lots of heat.
 

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While it will run without problems at 95C I think optimum temp is a lot lower, low to mid 80's is what I'm hoping for.

Whether this is achieveable now that my motor is tuned a bit is another question.
 

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Depending on the year of your CBR, I'm currently running a sub radiator without fan.
http://www.rocketjockeyracing.com/Images/Gallery/2005/10_01/4.JPG
You can kinda see the edge of the bottom radiator in the pic.

As mentioned earlier, and according to Harc-Pro the optimum running temp is 80C or between 70C - 95C

Word...
 

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Nice Ride rocketjockey!

I have a question for everybody,
what temperature does the engine start Warping at
from the Heat?

I can't remember what my temps were, but I think it hardly went over 170 farenheit,
 
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