alright guys, Im at a loss. My bike begins to overheat within 3-5 minutes after starting it. The needle goes to almost the redline after the 3-5 time after starting it. My radiator fan is working and i have it wired to run all the time. I changed the oil and oilfilter. And i drained the old radiator fluid and put in engine ice. The only thing i can think of is that there is a clogged line, the waterpump is bad or the thermostat went bad. How do i go about a radiator flush without buying any kits at the store etc? is there a way to tell if the waterpump and/or thermostat are bad? Thanks alot guys!

 

I got the same case like yours 3 weeks ago. The mechanic checked the waterpump and thermostat, they went just fine. But he found out that the radiator setting was not okay, not so sure what setting, so he set it and the overheatting is gone

 

I would check the thermostat...as far as BeeF4, he was probably talking about the setting for the temp setting for when the fan kicks on.

 

I don't know bout a cheap flush for sure, but I imagine you could take off the hoses and just put water into the hose that goes into the motor, and let it flow til clean clear water comes outa the motor? Then maybe tothe same with the radiator? IDK. Not positive tha'll work, but it worked on my truck...[8D] I think you'd pry have to take out the thermostat too for this to work well. ps, this is just a guess, but hypothetically it should work (i think)

 

If it gets hot that fast, I would guess your coolant is not flowing at all.I would guess that the engine wasnt properly bled of air. If there is air in thecooling system, it will not flow.

I'm not sure on that bike if there is a bleed screwor not.Some bikes have em, some do not. If that one does not, remove your thermostat housing and start the engine. This will allow all of the air to be pushed out of the engine. What happens is air gets trapped behind the thermostat. With air trapped there, there is no hot coolant to open the thermostat, just air. Be careful though, the coolant could be hot and it will come out with some force.

Your probably going to need a new gasket, so buy one before you take off the thermostat housing. But check very close on the bike to make sure there isnt a bleed screw... that would be the easiest if there was.