Dominik

my f4i is running hot, when left idling the temp. goes up, I've changed the thermostat but it didn't work, what should I do next, water pump? help

Black_ops_1

How hott is hott? My bike will run at 180-210 degrees which is normal. The only thing I can say is check the mix of coolant and possable add some water wetter to the system.

Dominik

it goes all the way to 230 and that's when the fan turns on, what's that water wetter?

Black_ops_1

I think it is made by Redline, it is a coolant additive. You know that the engine will get hott as hell if you are idling and not moving to get air through the rad.

Dominik

yeah but it never did, when I'm riding it will still run little too hot, i will see if the water pump works and i mwill flush the cooling sys.

-Eric-

if i leave my bike sit and idle it'll get to 226 then the fan turnes on. its normal. and when i compare it to the other bikes i ride with it always seems to be running hotter. try to give me a better example like 70 degrees in traffic after running for 5 minutes its at 200. and ill let you know what im running.

smb123

Well the reason is obvious and normal: bikes don't have the cooling capabilities that cars do so they MUST be moving to keep cool. Any bike, even water cooled bikes, will do this. I don't even know how air cooled bikes survive in traffic.

So, basically, normal. Don't let your bike sit and idle for a long time. If it starts creeping up to where the fans kick on, park the bike with the motor off but the key turned on so that the fan keeps running.. or start lane splitting and cool that sucker down.

Avoid temperatures exceeding 235-240* F -- you start running the risk of a very bad thing called head warpage. Not cool if you don't want to be replacing your cylinder head.