if you have around 60 hp you can use a +4 and if you have 75+ you can use a +6. With this new swing arm it will be harder to launch so you will need to get some 22 11 8 10 paddle haulers to hook up. I have 20 10 10 9 paddle extreme haulers and they dont work very good. I have to lauch in second and then about 10ft later put it in third to stop spinning the wheels. My gearing is 14 41 also so dont think I have close gears. Get some double buff ones if you can afford it.