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Old 05-30-2013, 12:32 AM   #1
Chuckster
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Bike Overheating (kinda)

So, my 2006 R1 was starting to run a little hotter than normal so I figured it was time to flush the radiator. So, I did this and refilled with Engine Ice. It still runs hot and the temp rises real fast when at a standstill. Once on the move, the temp drops down to around 190-195. It used to average 165-170. Could the thermostat not be opening/closing properly or is there another possible issue?
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Old 05-30-2013, 12:43 AM   #2
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Could be or you might have air trapped in the system when you flushed it. Did you bleed it? If I'm not mistaken dont the R1's generally run about 220 sitting still anyway? Another possibility is the outside temperature change may have been the original cause as well. Even though I have a GSXR I have noticed my temp go up since summer is pretty much here.
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Old 05-30-2013, 02:36 AM   #3
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I wish Id had those temps last summer! my Gsxr was running comfortable at 220-225 in traffic and under normal riding around 200. Never gave me a problem. I would however be sure to check for air bubbles. Chances are if your thermostat was not opening it would overheat the bike and cause more problems than what you think is a high temp.
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Old 05-30-2013, 02:42 AM   #4
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water and water wetter works great on all my bikes
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Old 05-30-2013, 05:57 AM   #5
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Check ur airbox and clean it if necessary.
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Old 05-30-2013, 06:34 AM   #6
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Quote:
Originally Posted by Chuckster View Post
So, my 2006 R1 was starting to run a little hotter than normal so I figured it was time to flush the radiator. So, I did this and refilled with Engine Ice. It still runs hot and the temp rises real fast when at a standstill. Once on the move, the temp drops down to around 190-195. It used to average 165-170. Could the thermostat not be opening/closing properly or is there another possible issue?
Not sure about the R1 but the thermostat on a CBR doesn't open until 174 degrees
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Old 05-30-2013, 06:56 AM   #7
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I did the same thing on my R6 last spring/summer. It ran hotter as well. Not to thread high jack but how do you purge air from the system??
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Old 05-30-2013, 07:14 AM   #8
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just drill few small holes on thermostat, so it will have small but constant flow of water into engine.

oh check your auxiliary fans, fuses might have blown.
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Old 05-30-2013, 07:18 AM   #9
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Quote:
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just drill few small holes on thermostat, so it will have small but constant flow of water into engine.

oh check your auxiliary fans, fuses might have blown.
Yeah remember you can't run a bike with no thermostat like you can a car... just saying.
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Old 05-30-2013, 07:22 AM   #10
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Sounds like the fan isn't kicking on to me.
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Old 05-30-2013, 07:42 AM   #11
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Quote:
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Sounds like the fan isn't kicking on to me.
Liter bikes heat up fast when still and the fans will never move the same amount of air when the bike is traveling at 70mph
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Old 05-30-2013, 08:07 AM   #12
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Sounds like it could be trapped air if the fan is kicking on. This may not be the proper way, but I've always added the coolant slowly and then once close to full lean the bike side to side as far as you safely can. After leaning the bike I squeeze the tubes running to and from the radiator. Whenever I would squeeze the tubes, you could feel air moving through the lines and see bubbles coming to the top. The fluid then drops a little and you fill it back up till eventually it starts running over into the reservoir. Just doing this, I've never had an overheating issue.
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Old 05-30-2013, 08:19 AM   #13
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sounds normal to me
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Old 05-30-2013, 09:03 AM   #14
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As long as its not getting over 220 230 you should be ok if your worried about still drill a few holes in the thermostat like was said earlier. You can also throw the thermostat in a pot of water heat up the pot and watch it with a infrared thermometer and see when it starts to open. My old klr started to run hot turns out the thermostat was slow to open I just removed it been fine since! my brandnew zx6 runs 210-220 in traffic so did my old 900rr and I never knew what my fz6s ran but they got toasty also!
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Old 05-30-2013, 09:16 AM   #15
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I run 180-185 on open road, 220-225 in traffic. Same with my last CBR. ZX10 ran about 10 degrees cooler.
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Old 05-30-2013, 09:24 AM   #16
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Fans kick in at 220 but can only bring it down to about 214. They used to bring it down to 210 or less. Yeah, I expect higher temps with the hotter weather. As for burping, I left the radiator cap off and let the bike idle up to its usual temp, about 160. I'd blip the throttle until the bubbles stopped surfacing then add more coolant. Since I've had the bike for 3 years, I was thinking the thermostat might not be opening properly. Guess I'll do a more thorough tear down when I get some time off. Just to check the thermostat.

And I cleaned out the fins on the radiator for bugs and other debris. No high pressure mess, just a degreaser spray and running water.
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Old 05-30-2013, 09:27 AM   #17
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4 degrees has you worried? It sounds fine
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Old 05-30-2013, 10:23 AM   #18
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How much is a new thermostat?
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Old 05-30-2013, 10:38 AM   #19
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How much is a new thermostat?

$22. Figured it can't hurt.
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Old 05-30-2013, 10:39 AM   #20
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Quote:
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$22. Figured it can't hurt.
Might as well
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