I have searched high and low on here and elsewhere for a 'how to' guide on flushing the coolant and found nothing specific for the TR650. Having consulted the resources for the BMW 650, I have done the following: 1. Removed the radiator cap. 2. Removed the bolt from below the water pump which drained about half a litre of coolant. 3. Removed the water hose from the cyclinder head which feeds into the lower part of the radiator. Perhaps another 100mls of coolant drained out. Clearly there is a lot more coolant to drain as the manual States that the cooling system requires just over a litre of coolant. One of the guides I consulted for the BMW GS650 indicated that to get a full drain the thermostat has to be removed from the radiator. Could this be the case for our radiators too? If so, how is it removed? Thanks for any advice! UPDATE I managed to dig up an old post which covers off on the factory manual instructions. And when I actually measured the coolant drained from the bike it was almost exactly 1 litre.
There is a lot of...extra stuff! on this post, but it does at some point discuss draining & getting air out of the system. I followed the advice, worked pretty well. http://www.cafehusky.com/threads/tr650-overheating.34169/
I'm sure you're all sorted by now, but here is a handy resource... factory serviced manual. Got all the handy charts in there for service intervals, etc. I sent it to TRZ Charlie so it can be added to the TR650 resource pages. http://www.endurofactory.nl/pdfs/2013/2012_WSM_TR_650_Terra-Strada.pdf
