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Old 03-23-2012, 05:42 PM   #1
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Question Engine temperature around 104 C when Idle

Hi all,
Need some technical advice. I noticed today returning from work on my CBR600RR 2007 that at stop sign or signals, the engine temperature was touching around 104C. It went down to 82 C when I start moving. Is it normal because it felt hot under the thighs and very uncomfortable. I got the oil changed just before Christmas and I have ridden only few times since then.
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Old 03-23-2012, 05:44 PM   #2
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Do you have a aftermarket exhaust?
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Old 03-23-2012, 05:50 PM   #3
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Quote:
Originally Posted by Stranger View Post
Hi all,
Need some technical advice. I noticed today returning from work on my CBR600RR 2007 that at stop sign or signals, the engine temperature was touching around 104C. It went down to 82 C when I start moving. Is it normal because it felt hot under the thighs and very uncomfortable. I got the oil changed just before Christmas and I have ridden only few times since then.
probably a stupid question but is it Liquid cooled or air cooled? And EVEN THEN--Cooling down when moving makes sense since air is now flowing over the bike.
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Old 03-23-2012, 05:59 PM   #4
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Pretty normal. Just out of curiosity, how the are you getting a reading in Celsius? That ~219* Fahrenheit. A lot of sportbike radiator fans don't kick in until 220*F. I think my gixxer kicked in at 225*F.
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Old 03-23-2012, 06:03 PM   #5
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104C (220F) seems about right for motorcycles during slow & around town traffic (basically no much wind hitting)

If the gauge shows 104 and then fans turn on => you are ok.
if the gauge shows 104 and fan doesn't go on => you worry.
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Old 03-23-2012, 06:05 PM   #6
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Originally Posted by pinball View Post
Pretty normal. Just out of curiosity, how the are you getting a reading in Celsius?.
on the gauge, you can choose if u want Farenheit reading or Celsius reading. As well as kmh and mph.
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Old 03-23-2012, 06:37 PM   #7
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Thanks guys. I appreciate all your comments. Yes it does has aftermarket full exhaust system. The temperature was not crossing 104 which means that the fan was kicking in. Man.. it feels hot. I am sure that I don't want to be stuck in traffic with this temperature.
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Old 03-23-2012, 07:05 PM   #8
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Do us all a favor and switch your gauges to American standard. CBRs heat up fast when they're not moving and with the narrow front end they really don't get enough air flow over the radiator until you hit about 70mph with undisturbed air in front of you. If you're cruising behind cars they block the flow too.

104 C = 219.2 F. That's not in the high range when you're stopped
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Old 03-23-2012, 07:13 PM   #9
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Do us all a favor and switch your gauges to American standard.
What are you saying here, motohouston isn't an international forum?
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Old 03-23-2012, 07:16 PM   #10
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What are you saying here, motohouston isn't an international forum?
Do you ride on the internet?
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Old 03-23-2012, 07:31 PM   #11
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When I bought this bike it was on Celsius and really it doesn't matter to me whether it C or F as far as it is not over heating.
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Old 03-23-2012, 07:33 PM   #12
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Yes, I don't even own a bike. I am here for the girls.
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Old 03-23-2012, 08:25 PM   #13
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Hondas usually kick the fan on around 230. Temp should never peak over 236
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Old 03-23-2012, 09:06 PM   #14
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Your bike is normal. My seat gets hot sometimes too, esp. going from freeway to lights 'n traffic - I believe it has to do with having the battery under the seat. I've heard that mixing water with "water wetter" (product name) & certain coolant is helpful for temperature. Also the grade of oil you use can have an effect. I switched from Rotella T6 to Yamalube 20W-50 (non-synthetic) and I'm running cooler now.
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Old 03-23-2012, 10:58 PM   #15
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Quote:
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When I bought this bike it was on Celsius and really it doesn't matter to me whether it C or F as far as it is not over heating.
I guess it did matter or you wouldn't have started the thread
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Old 03-23-2012, 11:14 PM   #16
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Quote:
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Hondas usually kick the fan on around 230. Temp should never peak over 236
Can't remember the specs for the 600 but on my 1KRR the first fan kicks on around 215F. The high end of normal stops at 250F. Between 251 - 269F the warning lights and gauge will start to flash. At 270F the warning lights are solid and the 270F flashes and will read no higher.
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Old 03-23-2012, 11:38 PM   #17
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250F ? wow. Mine comes right on at 220, maybe 223. Then fan kicks in and drops it down to 210
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Old 03-24-2012, 09:22 PM   #18
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Quote:
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250F ? wow. Mine comes right on at 220, maybe 223. Then fan kicks in and drops it down to 210
No, the fan starts around 215. The bike doesn't give a warning until 251, so 250 is high normal.
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Old 03-24-2012, 11:15 PM   #19
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Yeah, my R1's fan kicks on at 221°F and ruins until out gets below 212°F. The highest I've seen is 234°F right after coming off the track.

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