It has two measurements. One for the 50cc and one for the 125cc.
On the 50cc it says per leg
And on the 125 it doesn't say anything. Now do we take the assumption that it said it for the above so the rule applies for the latter or do we think that it said it for the above so it's not true for the latter.
Personally never changed it. If it's for both legs you'll soon find out since it will be way too much.
I pay £180 TPO. Ceebs with TPFT Since I only use it when the weathers lush. DT mind is only TPO, when that got nicked I was grieved! Lucky to get it back mind.