Hi have started radiator flush and system,got out the old stuff(looked like screen wash no smell no taste)
and in the haynes manual it says it should take 3.25 l on change howerever didnt take that waited for ages for air to move,ran her a bit let air out etc,but only took 2.8 l altogether,now i havent touched refilled the expansion chamber but while checking in manual struck me it was the right level for a K 75,wondered if anyone knew if theres a marking on radiator to check if its 100 or 75 spec.Also if its 75 would there be any risk?doesnt seem like there has been a problem comparing what everyone says everything works okay,fan comes on etc,mainly in city centre when stuck in traffic,no overheating etc.
thanks
pete
Ps drain plug was removed by old fashioned way blunt screwdriver and a hammer!when refilling with coolant im using gasket sealer so threads cant get damaged or corroded like original.

Radiators for the K75 and the K100 are the same. The difference with the K100 in relation to the K75 is that you have to fill the extra water chamber for the 4th cylinder.
When the bike is cold, fill up the radiator (air bubbles will rise).
Fill up the expansion tank between the high and low mark (mark the level for reference).
When the bike is really hot, the level of the expansion tank may rise. If it does, it proves that the radiator is really full.

I am also a fan of putting the right amount of Redline Water Wetter in just to ensure the water shifts as much heat out of the engine as it can and reduce the micro boiling which happens around the hot spots.
Regards,
K-BIKE