Shovel Jockey
Piano Tuna
My fav is 17/33 with an 18" rear wheel. You wouldn't think just one tooth would make much difference but it really does. Benefits are little if any loss of low speed "lunge" and a reduction of a few hundred RPMs at highway speeds. I feel this is the ideal gearing for this motor with an 18" rear. I have a spare wheel with a 32 on it and don't care for it as much.
5twins,are you using the 17/33 with a 110/90 X 18 or a 4.00 X 18 tire? Or something different?