AMA Supersport Racer
Join Date: Jun 2010
Thanked 81 Times in 65 Posts
Feedback Score: 27 reviews
Bike overheats, but only while idling..
My room mate has an 07 cbr 600rr with 6k miles.
he bought the bike used at the start of the summer, and after a week of owning it he noticed that the bike would overheat while riding. the bike was stock when he bought it, and the only thing he has added so far is a tripage IT, proton flush mounts, integrated mirrors, and a leo vince slip on.
in order to fix the over heating problem the following has been attempted so far:
flush and change coolant system (this was done twice, no air is in the system, using engine ice)
change oil and filter, using full synthetic mobile one motorcycle oil (yes we used the correct oil for the bike, we looked it up in the manual)
checked the function of the water pump (it tested fine)
replace temperature sensor
replaced water pump
hardwire fan so that it is always running as long as the key is in the "on" position
he also took the bike a private mechanic that used to work for a Honda racing team. This mechanic was the one that first tested the water pump, then replaced the thermostat. then he swapped the sensor. this helped the problem of the bike overheating while riding. he then removed the thermostat completely just to make sure that it wouldn't get stuck and he put a fresh water pump in as well just as a precaution.
at this point the bike does not come close to overheating while riding, it stays under 200 almost all the time. it only over heats after you let it idle for about 7-10 minutes.
we are thinking maybe something with the head gasket? so we were thinking that a compression test and a pressure test of the cooling system might be needed to help figure out this issue?
any ideas on where to go from here?
Last edited by SuperBrute; 11-11-2010 at 10:01 PM.
Reason: added in that water pump was replaced as well