WOW. What a difference this makes. I bought a suspension air pump today, HD $45. I know, too expensive. I will say however, I hooked it up to see I had 15 lbs in my system. I increased to 30 lbs (09 ultra) and the ride was improved dramatically. I never would have thought it could make this much difference. I still have to try two up but the ride solo was noticably improved. Not much to it but works great!:s