I changed all the fluds on my new to me 88 r100rt today with no issues. Took it out for a ride after to check for leaks and such. Rode about 10 miles in 80 degree weather. Went to check oil filter housing and cooler lines and noticed the lines were still cool to touch all the way up to cooler. My concern is at what point does the thermostat open or should it of opened and is malfunctioning???