Best Coolant?

Just wondering what kind of coolant is the best for the f4i's and what type everyone uses. 
Also, I noticed there is two line on the coolant top, which line should it be filled too?
 
Thanks!

Coolant is coolant.

ha use whatever is at the honda shop?
and is for aluminum parts.. and distilled water.. dont want any corrosion

I use water

Someone told me of this stuff called ICE COLD or something.....i thought since our bikes burn kind of hot, maybe adding some better coolant might bring the temp down a lil bit. 

i just changed mine flushed and replaced with Prestone 50/50 prediluted and now my bike wont go under 211 while riding highway and 222 riding city and 233 (i saw it up there quite some times) while idleing at light.  Dont wanna thread jack but anybody knows if theres a wrong way to change coolant or why it could be overheating.  thanks in advance 

quote:

ORIGINAL: BigWill

I use water

+1
I'll switch to "the green stuff" in the fall for storage in the winter

I use Engine Ice.  Helps protect against corrosion and sopposed to make bike run cooler but I didnt notice a difference.  If you ride on the track you would need a coolant like Engine Ice or plain water.  You could also use some Water Wetter with regular coolant as well to help it run cooler as an option. 

Is there a draw back to using water?  Is that distilled water?

The drawback to using water is that it does not have any corosion fighting agents in it which could damage the coolong system overtime if not maintained.  Distilled would be better than tap water.  For normal street use I would run a 50/50 mix of water and coolant, or straight Engine Ice or something similar.

or water and water wetter.

quote:

ORIGINAL: 01kwt2000

i just changed mine flushed and replaced with Prestone 50/50 prediluted and now my bike wont go under 211 while riding highway and 222 riding city and 233 (i saw it up there quite some times) while idleing at light.  Dont wanna thread jack but anybody knows if theres a wrong way to change coolant or why it could be overheating.  thanks in advance 

Just throwing this idea out there. You could have air built up in the coolant system, after I do a coolant flush I usually burp the system to try and get out as much air as I possibly can.

water and water wetter

Does the water and water wetter combo keep the bike cooler than Enging Ice would?

good quesetion. i did not get a chance to use other products after switching to Wetter. 

Plain ethylene glycol, better known as the good old fashoined green antifreeze, works very well in most applications. The only real reason not to use it is perhaps on a track where they only allow water. It raises the boiling point, lowers the freezing point, provides corrosion resistance, and even promotes a little lubrication for the water pump seals. Cooling systems that have been run with plain water for extended periods of time look like they have had lye run through them. The crystalline structure attack on the aluminum is not pretty.

Thanks for the advice everyone!