after looking at the web site for the v force reeds the low tension looks like it should be used for wide open gas or no gas uses such as drag racing. and the high tension for any other use, the low tension make more since to be used in drag bikes because it goes open then shut . not being open and shut more than a few time a minute. if i lost you the may be this wil help. if you ride a trail or dunes how many time do you get on the gas and off againthen the need for high tensions to help the life of the reed is there. if it is set to low tension the the reed will open farther and faster for drag reasons. hope this helps