5EB Overheating, help

Vtec_eck · Apr 14, 2011

My 2000 R6 5EB is overheating during normal driving, i first thought it was the thermostatic fan switch as when the connection to this was bridged the fan worked. I changed this part for a new yamaha one but this has made no difference at all.

The fan did come on intermittently a couple of times but just stopped again and the bike continued to overheat and take a p*ss from the overflow at which point i killed it.

My question is, what else could be causing this problem? Could it be the thermostat or a blockage in the cooling system or what? I currently cannot afford to put the bike into a garage in case they take a long time to diagnose the fault and i just want to get out and play. The coolant seems to be circulating, i just dont know whether the temperature displayed on the speedo, which i gather is from the thermostat is the same as the temp in the radiator which is not allowing the fan to kick in.

Any one else experienced a problem like this? Any info or advice on how to right it would be greatly appreciated.

Thanks

ohhhwatda · Apr 14, 2011

If it was a fan problem, you won't be over heating while moving because of the ram air which is pretty much what the fan does. The fan gets a temp reading off of a coolant temperature sensor. When the bike is cold, check both hoses as the temp gradually increases. If it gets up to operating temperature and 1 hose is ice cold, it could be a thermostat, clogged rad. If it stays in good temp at idle, and as you start moving it starts to overheat, the fins on your waterpump are worn down.

k24a · Apr 14, 2011

Check relay
replace coolant(water temporary)
If you are still hot replace the t-stat temporary leave it out and see if still do. If so check if the pump is working, if not replace both pump and t-stat.

ChiefSmokeDawg · Apr 15, 2011

You're coolant level is too low. The fan sensor/switch is in the radiator on the right side and is VERY high up in the rad. It's an awful design. My fan didn't come on for almost a full season until I topped off the coolant. Top it off, and make sure the overflow canister is full. When you fill the rad, and cap it, that's not full. If you fill that overflow canister and run the bike, it will draw in like 2 fillings of that canister.

Try that out bro. Use premixed coolant for motorcycles, and if you add water, use distilled water.

If the rad was clogged you'd overheat in like 5 minutes of riding, not while in traffic.

5EB Overheating, help

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