I would say 80 is ok for normal driving, but it really depends the oil you use. You should check the oil tech spec for shear point. I wouldn't go over 110c as usually the oils start to become ineffective. There are some oils though that will work higher temps.
Removing the seat will help, as you can lie down on your back, you will need a small spanner and the space is very limited, but you can get it off little by little.