2006-2009 Suzuki LT-R450 Service Manual, Page 27Get this manual
PERIODIC MAINTENANCE
Install the radiator cap securely After warming up and cooling down the engineadd engine coolant until the level is between the upper and lower lines on the engine coolant reservoir
I CAUTION I
Repeat the above procedure several times and make sure the radiator is filled with engine coolant to the upper line of the engine coolant reservoirEngine coolant capacity (including reserve): 400 ml (1.5 US qt, 1.2 Imp qt)