After I acquired my Teal Tourer and had the bills from previous owner who had the forks rebuilt at a Honda dealer I had this same bang even at slow speeds over the apron up my driveway. I removed the forks and poured out the fluid, left side was good at almost 24oz. (I think) but right fork had only 8oz., it should get almost 22oz. I believe. I guess the dealer only wanted to use one quart as that is what I recovered. the right fork does most of the bump absorbing and the left fork the return down. There is a way to check your fluid level by removing the top caps and measuring down with a ruler, do a search here on fork oil level and do some reading.. also the right fork needs to be pump up and down to allow the fluid to enter the lower area of the fork. easy to check fork level by loosening the top 2 pinch bolts, (allen head) and then take off big nut cap. hope this helps you.
