With the riding season coming to an end soon, I decided to do some experimenting before it was too late to test. I've been alternating clutch settings and different pulleys in order to find a happy medium between both cruising and hill climbing, since I've found a new route which has brought the hill climbing abilities of the previous set-up into question. After trying various combos of clutch settings and different pulleys ranging from 3" to 4" I think I've found a good compromise. I'm back to running the 4" pulley but, I swapped the driven clutch spring out for a new one and set it on the #3 setting. I had to have a friend of mine help with reassembly of it because pre-loading the spring, and then holding it all in place while installing the snap ring is tough!! The bike accelerates way faster now and climbs hills much smoother and easier. So smooth that I had to make sure the belt was actually dropping down into the driven clutch properly by marking the buttons with a marker, and then checking to see if it was rubbed off after riding it. Only thing I wish I'd done is "scuff" the surfaces of the driven clutch while it was apart to ensure good belt contact and no slipping. I did polish the aluminum hub while it was off but, forgot to scuff the mating surfaces before my friend showed up for re-assembly. I recommend trying out the various driven clutch settings and pulley sizes. It can really make a dramatic difference on both power and speed. It's a good time to service it also.