To get over the woops at olds you will need a longer swing arm. I have a +6 ris design honda style rear carrier swing arm that I got complete for 650 chromed. Depending on your hp output you might need a different lengh. I kind of wished that I have a +4 because I like to do wheelies and it is hard with a +6 and +1 forward a arms. Also if you are looking to do this mod get some 22inch skat trak extreme haulers on a 8 inch rim because I just spin the tires at the launch. Oh ya and with this mod I never let off the gas up the hill at all and it eats up the whoops.