Overheating Problems Persist.

Did you check your pump?

 

My new 765 did not start venting until after 8000 rpm threshold was passed. Are your fans running, and in the right direction? 220 might be normal for that motor. Is the sensor good? Borrow an IR temp gun?

 

Assuming the temp gauge is correct, the FIRST thing I would do is whip out the thermostat. It will do three things:

A) make it run cold blooded so slow to warm up but at this time of year insignificant

B) allow free circulation of coolant and ease clearance of any air locks

C) see if a blocked (non functioning) thermostat is the (most likely) cause of the problem.

Part no 36 on the attached accessed under cover 37.



675 Daytona .......not sure which model yours is but plumbing is generally similar.

 

If you run it with the rad cap off you should see coolant being pumped back into the rad just below the filler neck via the bypass hose. should be a good fast flow.

 

chipmiester.
If the bike is hot the water will come out. I would remove the thermostat and run it without see what happens like someone said. That way its operating all the time. Then check the pump.
Regards
Joe.

 

Is that when it is hot or cold. When cold with a thermostat in place, all the water will be coming through the bypass hose and you should see a good strong continuous flow just below the filler cap. If hot or with thermostat out , most of the water will be being pumped via the top hose into the top right of the radiator and you will not see this. The flow via the bypass hose will be reduced.

 

Is that when it is hot or cold. When cold with a thermostat in place, all the water will be coming through the bypass hose and you should see a good strong continuous flow just below the filler cap. If hot or with thermostat out , most of the water will be being pumped via the top hose into the top right of the radiator and you will not see this. The flow via the bypass hose will be reduced.

 

BTW I may be talking shit because I'm not familiar with the pipework layout on a 675 I'm going by my 1050.

 

Well that sounds to me like the pump is working ok unless you have a head gasket failure and combustion products are forcing the water to overflow but if that were the case you would be able to smell it and see the gas bubbles. You do mention alot of bubbles coming through at the beginning of this thread.