Back in 2011 Harley went to the 30 tooth primary pulley to give the "beast" more get up and go. However the revs went up at highway speed but that was okay because the triglide from the get go was under powered (pushing a lot of air with a motor engineered for a two wheel cycle) I put on several thousand miles on my 2011 and switched to the 32 tooth as used on the two wheelers in hopes of reducing the revs at highway speed..........boy was that a wrong move and costly!!! Due to the lack of torque and again using a 2 wheel motor to propel a behemoth with lots of wind resistance, I went backwards in gas mileage and real pulling power (running outside the power range) I went back to 2 wheels (Ultra Limiteds for a few years and then back to a Triglide in 2016 and finally the MILWAUKEE 8 CAME OUT!! My wish for a motor to propel a trike without adding tons of upgrades was right in front of me!! I bough a 2017 and immediately noticed a big increase in "get up and go" right out of the show room!! Now I'm wondering if the experiment with a 32 tooth pulley should be tried again??? Any input?