Join Date: May 2010
Location: Cedar Rapids, Iowa
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If you were able to open the radiator cap while the coolant was hot enough to be boiling, and not get scalded, you're way low on coolant. Which could be because of the leak. But, might be that you didn't get all of the air out of the system when you changed the radiator, which could lead to overheating. Also, when you filled the radiator, did you fill it with a 50/50 (coolant/water) mix? If the coolant you bought was not pre-mixed 50/50, and you put it in without mixing adding water, could be contributing to running hot.
Took a look at the radiator pic. Is that the original radiator, or the replacement? If it's the replacement, was it new or a used/reman unit. Looks a little rough, but maybe it's just really dirty. I'll ask what may seem a stupid question, but are you sure you have a hole in the new radiator, and not a leak at the cap or a hose that is running down and dripping out where you see the coolant?
If you're sure it's a hole, and there is no evidence of an impact or physical damage, I'd go back to place where you got the radiator and ask about getting it replaced under warranty. Even used/reman parts sometimes come with a warranty, though usually a pretty short one.
Just took another look at the pic. Do you have a screen/guard in front of your radiator? Have you tried removing it to see if the improved airflow helps keep the temp in check? Is your fan coming on when temps climb. Don't remember the exact trigger temp for the fan, but am thinking it's between 220 and 230.
'09 CBR600RR - Phoenix (currently stock)