Alright, ive been having overheating issues since i bought my2000 cbr 600 f4a couple months ago. When i first bought it, the bike would heat up almost all the way to the red on the temp. guage. I changed the oil and oil filter, put in anew thermostat, flushed my radiator and put in fresh honda motorcycle radiator fluid and wired the radiator fan to run all of the time and the bike is still heating up almost all the way to the red on the temp guage. I can feel the heat coming off of the bike too.

When i put fresh fluid in, it only took 1 3/4 quarts before it way full. I started the bike to get the air bubbles out but i still could not manage to get any more fluid in the bike. It says in the manual that it should take almost 3 quarts??? Can my hoses be clogged? When i flushed the radiator i opened the drain on the water pump and put a garden hose in the top of the radiator and flushed it with the bike running for about 5 minutes. if the water came out of the water pump with alot of pressure then that means that there cant be a clog, correct?? any help is appreciated.

 

First you shoulnt use tap water. tap water will leave deposites in the cooling system that will harm the cooling system. use distilled water. I just changed out my coolant last week and all my bike (2001 929RR) and it only used 2 quarts. Also did you drain the coolant resevoir. there is a syphon hose that goes from the resevoir to the radiator. (just below the radiator cap) the syphon hose will drain any coolant in the resevoir. after you drain that out just hooked the hose back up and fillthe resevoirto upper line. if you already did this then you could have a bad water pump. check for any leaking around the water pump. the seals on them go out after a while. hope this helps atleast a little.

 

I've been having the same issue but not quite as severe. First thing i did was change the fluids, didnt work.
Pull off the water pump and inspect. Make sure its rotating freely. Hit the starter momentairly to make sure the shaft in the engine is spinning.
Make sure the fan is blowing the right way.
You CAN keep the thermostat out to keep the coolant constantly flowing, but only when its warm out.

I was having some other problems that related, lack of power etc and I pulled the engine. The pistons has a large layer of carbon on them andfrom all I have read this will keep the engine warmer....

 

have you checked the radiator itself to make sure its not full of leaves, pine needles, bugs, raccoons, pizza or Ford Escorts? Check behind it as well to make sure there isnt anything behind blocking air too.

 

Coolant should be added to the reservoir bottle, and not through the radiator... for final filling at least. Here's what I do for a flush and fill:
1. Drain coolant and inspect for signs of oil, etc...
2. Replace drain plug
3. Remove siphon hose and drain reservoir bottle
4. Replace siphon hose
5. Remove radiator cap and pour fresh coolant into the radiator (bike should not be running) until coolant level sits about 1/2" above radiator passages
6. Replace radiator cap
7. Start the bike, and let it warm up to operating temp
8. With the bike on a level surface, fill the plastic reservoir to the "low" mark with coolant
9. Sharply snap the throttle on the bike a few times (remember, the bike should be at operating temp)
10. With the bike on a level surface, check the coolant level in the plastic reservoir. Add coolant if necessary

Repeat steps 9 and 10 until snapping the throttle doesn't change the level of coolant in the plastic reservoir. Then, just top off the reservoir to the "upper" mark, and you're done!